IDEA-112304 Compile annotations.jar with lowest possible version of java

.idea/compiler.xml

@@ -26,6 +26,7 @@
       </profile>
     </annotationProcessing>
     <bytecodeTargetLevel target="1.6">
+      <module name="annotations" target="1.5" />
       <module name="groovy-rt-constants" target="1.5" />
       <module name="groovy_rt" target="1.5" />
       <module name="java-runtime" target="1.3" />

build/conf/classVersions.txt

@@ -31,7 +31,8 @@
 1.3 => lib/idea_rt.jar
 
 1.7 => lib/fxHelpBrowser.jar
-- => lib/optimizedFileManager.jar
+1.7 => lib/optimizedFileManager.jar
 
 1.5 => plugins/Groovy/lib/groovy_rt.jar
+1.5 => lib/annotations.jar
 

platform/annotations/annotations.iml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <module relativePaths="true" type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" inherit-compiler-output="true">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_5" inherit-compiler-output="true">
     <exclude-output />
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />