(maint) Stop mocking version_is_less in do_install tests

Each change to do_install and supporting methods involving a
version_is_less call was requiring additional mocking simulating
version_is_less's behavior.  This is unnecessary given that hosts are
being set with a version, and actually masks behavior of the class.
Removing these specifically because it was causing churn when
introducing meep functionality.

spec/beaker-pe/install/pe_utils_spec.rb

@@ -400,12 +400,6 @@ def logger
       allow( subject ).to receive( :stop_agent_on ).and_return( true )
       allow( subject ).to receive( :sleep_until_puppetdb_started ).and_return( true )
       allow( subject ).to receive( :max_version ).with(anything, '3.8').and_return('3.0')
-      allow( subject ).to receive( :version_is_less ).with('3.0', '4.0').and_return( true )
-      allow( subject ).to receive( :version_is_less ).with('3.0', '3.4').and_return( true )
-      allow( subject ).to receive( :version_is_less ).with('3.0', '3.0').and_return( false )
-      allow( subject ).to receive( :version_is_less ).with('3.0', '3.99').and_return( true )
-      allow( subject ).to receive( :version_is_less ).with('3.99', '3.0').and_return( false )
-      allow( subject ).to receive( :version_is_less ).with('3.0', '2016.1.0').and_return( true )
       allow( subject ).to receive( :wait_for_host_in_dashboard ).and_return( true )
       allow( subject ).to receive( :puppet_agent ) do |arg|
         "puppet agent #{arg}"
@@ -476,9 +470,6 @@ def logger
       allow( subject ).to receive( :create_remote_file ).and_return( true )
       allow( subject ).to receive( :stop_agent_on ).and_return( true )
       allow( subject ).to receive( :max_version ).with(['3.0'], '3.8').and_return('3.0')
-      allow( subject ).to receive( :version_is_less ).with('3.99', '3.0').and_return( false )
-      allow( subject ).to receive( :version_is_less ).with(anything, '3.2.0').exactly(hosts.length + 1).times.and_return( false )
-      allow( subject ).to receive( :version_is_less ).with(anything, '4.0').exactly(hosts.length + 1).times.and_return( true )
 
       expect( subject ).to receive( :on ).with( hosts[0], /puppet-enterprise-installer/ ).once
       expect( subject ).to receive( :create_remote_file ).with( hosts[0], /answers/, /q/ ).once
@@ -514,13 +505,6 @@ def logger
       allow( subject ).to receive( :stop_agent_on ).and_return( true )
       allow( subject ).to receive( :sleep_until_puppetdb_started ).and_return( true )
       allow( subject ).to receive( :max_version ).with(anything, '3.8').and_return('4.0')
-      allow( subject ).to receive( :version_is_less ).with('4.0', '4.0').and_return( false )
-      allow( subject ).to receive( :version_is_less ).with('4.0', '3.4').and_return( false )
-      allow( subject ).to receive( :version_is_less ).with('4.0', '3.0').and_return( false )
-      allow( subject ).to receive( :version_is_less ).with('3.99', '4.0').and_return( true )
-      allow( subject ).to receive( :version_is_less ).with('4.0', '2016.1.0').and_return( true )
-      # pe_ver is only set on the hosts for this test, not the opt
-      allow( subject ).to receive( :version_is_less ).with('4.0', '3.99').and_return( true )
       allow( subject ).to receive( :wait_for_host_in_dashboard ).and_return( true )
       allow( subject ).to receive( :puppet_agent ) do |arg|
         "puppet agent #{arg}"
@@ -578,14 +562,6 @@ def logger
       allow( subject ).to receive( :stop_agent_on ).and_return( true )
       allow( subject ).to receive( :sleep_until_puppetdb_started ).and_return( true )
       allow( subject ).to receive( :max_version ).with(anything, '3.8').and_return('4.0')
-      allow( subject ).to receive( :version_is_less ).with('4.0', '4.0').and_return( false )
-      allow( subject ).to receive( :version_is_less ).with('4.0', '3.4').and_return( false )
-      allow( subject ).to receive( :version_is_less ).with('4.0', '3.0').and_return( false )
-      allow( subject ).to receive( :version_is_less ).with('3.99', '4.0').and_return( true )
-      allow( subject ).to receive( :version_is_less ).with('3.8', '4.0').and_return( true )
-      allow( subject ).to receive( :version_is_less ).with('4.0', '2016.1.0').and_return( true )
-      # pe_ver is only set on the hosts for this test, not the opt
-      allow( subject ).to receive( :version_is_less ).with('4.0', '3.99').and_return( true )
       allow( subject ).to receive( :wait_for_host_in_dashboard ).and_return( true )
       allow( subject ).to receive( :puppet_agent ) do |arg|
         "puppet agent #{arg}"
@@ -640,14 +616,6 @@ def logger
       allow( subject ).to receive( :stop_agent_on ).and_return( true )
       allow( subject ).to receive( :sleep_until_puppetdb_started ).and_return( true )
       allow( subject ).to receive( :max_version ).with(anything, '3.8').and_return('4.0')
-      allow( subject ).to receive( :version_is_less ).with('4.0', '4.0').and_return( false )
-      allow( subject ).to receive( :version_is_less ).with('4.0', '3.4').and_return( false )
-      allow( subject ).to receive( :version_is_less ).with('4.0', '3.0').and_return( false )
-      allow( subject ).to receive( :version_is_less ).with('3.99', '4.0').and_return( true )
-      allow( subject ).to receive( :version_is_less ).with('3.8', '4.0').and_return( true )
-      allow( subject ).to receive( :version_is_less ).with('4.0', '2016.1.0').and_return( true )
-      # pe_ver is only set on the hosts for this test, not the opt
-      allow( subject ).to receive( :version_is_less ).with('4.0', '3.99').and_return( true )
       allow( subject ).to receive( :wait_for_host_in_dashboard ).and_return( true )
       allow( subject ).to receive( :puppet_agent ) do |arg|
         "puppet agent #{arg}"