Removing rubocop offenses

lib/pacto/native_contract_factory.rb

@@ -10,17 +10,14 @@ def initialize(options = {})
     end
 
     def build_from_file(contract_path, host)
-      contract_definition = File.read(contract_path)
-      if contract_path.to_s.end_with? '.erb'
-        contract_definition = ERB.new(contract_definition).result
-      end
-      definition = JSON.parse(contract_definition)
+      definition = parse_json(contract_path)
       schema.validate definition
-      definition['request'].merge!('host' => host)
+
       body_to_schema(definition, 'request', contract_path)
       body_to_schema(definition, 'response', contract_path)
       method_to_http_method(definition, contract_path)
-      request = RequestClause.new(definition['request'])
+
+      request = RequestClause.new(definition['request'].merge('host' => host))
       response = ResponseClause.new(definition['response'])
       Contract.new(request: request, response: response, file: contract_path, name: definition['name'], examples: definition['examples'])
     end
@@ -40,6 +37,12 @@ def files_for(contracts_dir)
 
     private
 
+    def parse_json(path)
+      contents = File.read(path)
+      contents = ERB.new(contents).result if path.extname == '.erb'
+      JSON.parse(contents)
+    end
+
     def body_to_schema(definition, section, file)
       schema = definition[section].delete 'body'
       return nil unless schema