Fixes incorrect checks of the simplesamlphp property.

Author: dooleymatt

phing/tasks/deploy.xml

@@ -87,7 +87,7 @@
 
     <available property="simplesamlphp" file="${blt.root}/settings/simplesamlphp.settings.php"/>
     <if>
-      <istrue value="${simplesamlphp}"/>
+      <equals arg1="${simplesamlphp}" arg2="true"/>
         <then>
           <phingcall target="simplesamlphp:deploy:config"/>
         </then>

phing/tasks/setup.xml

@@ -64,7 +64,7 @@
 
     <available property="simplesamlphp" file="${blt.root}/settings/simplesamlphp.settings.php"/>
     <if>
-      <istrue value="${simplesamlphp}"/>
+      <equals arg1="${simplesamlphp}" arg2="true"/>
         <then>
           <phingcall target="simplesamlphp:build:config"/>
         </then>

phing/tasks/simplesamlphp.xml

@@ -6,7 +6,7 @@
     <available property="simplesamlphp" file="${blt.root}/settings/simplesamlphp.settings.php"/>
 
     <if>
-      <isfalse value="${simplesamlphp}"/>
+      <not><equals arg1="${simplesamlphp}" arg2="true"/></not>
       <then>
         <phingcall target="simplesamlphp:lib:init"/>