Remove source annotations when copy class with kapt2

Writing source annotations enables incremental compilation for kapt2.
However they are not needed in bytecode, so we remove them when
copying classes.

# Conflicts:
#	compiler/cli/src/org/jetbrains/kotlin/cli/jvm/K2JVMCompiler.kt
#	compiler/frontend.java/src/org/jetbrains/kotlin/config/JVMConfigurationKeys.java

plugins/plugins-tests/tests/org/jetbrains/kotlin/annotation/processing/test/processor/AbstractProcessorTest.kt

@@ -43,7 +43,7 @@ import javax.lang.model.element.*
 class AnnotationProcessingExtensionForTests(
         val processors: List<Processor>
 ) : AbstractAnnotationProcessingExtension(createTempDir(), createTempDir(), listOf(), true,
-                                          createIncrementalDataFile(), StubIncrementalCompilationComponents()) {
+                                          createIncrementalDataFile(), SourceRetentionAnnotationHandlerImpl()) {
     override fun loadAnnotationProcessors() = processors
     
     private companion object {
@@ -55,14 +55,6 @@ class AnnotationProcessingExtensionForTests(
             deleteOnExit()
         }
     }
-    
-    private class StubIncrementalCompilationComponents : IncrementalCompilationComponents {
-        private val sourceRetentionAnnotationHandler = SourceRetentionAnnotationHandlerImpl()
-        
-        override fun getIncrementalCache(target: TargetId) = null!!
-        override fun getLookupTracker() = null!!
-        override fun getSourceRetentionAnnotationHandler() = sourceRetentionAnnotationHandler
-    }
 }
 
 abstract class AbstractProcessorTest : AbstractBytecodeTextTest() {

plugins/plugins-tests/tests/org/jetbrains/kotlin/annotation/processing/test/processor/ProcessorTests.kt

@@ -233,10 +233,8 @@ class ProcessorTests : AbstractProcessorTest() {
     fun testSourceRetention() {
         test("SourceRetention", "*") { set, roundEnv, env -> }
         val ext = getKapt2Extension()
-        val incrementalCompilationComponents = ext.incrementalCompilationComponents
-        assertNotNull(incrementalCompilationComponents)
-        val annotationHandler = incrementalCompilationComponents!!.getSourceRetentionAnnotationHandler()
-        val annotations = (annotationHandler as SourceRetentionAnnotationHandlerImpl).sourceRetentionAnnotations.sorted()
+        val annotationHandler = ext.sourceRetentionAnnotationHandler as SourceRetentionAnnotationHandlerImpl
+        val annotations = annotationHandler.sourceRetentionAnnotations.sorted()
         assertEquals("Source1, Source2, Source3, Source4, Test5\$Source5", annotations.joinToString())
     }