Use module to resolve top level class in DecompiledTextConsistencyTest

Refactor: rename ResolverForDecompiler#resolveClass to resolveTopLevelClass to document assumptions made in implementations

idea/src/org/jetbrains/jet/plugin/libraries/DecompiledTextFactory.kt

@@ -44,7 +44,7 @@ public fun buildDecompiledText(
         buildDecompiledText(packageFqName, ArrayList(resolver.resolveDeclarationsInPackage(packageFqName)))
     }
     else if (kind == KotlinClassHeader.Kind.CLASS) {
-        buildDecompiledText(packageFqName, listOf(resolver.resolveClass(classFqName)).filterNotNull())
+        buildDecompiledText(packageFqName, listOf(resolver.resolveTopLevelClass(classFqName)).filterNotNull())
     }
     else {
         throw UnsupportedOperationException("Unknown header kind: " + kind)

idea/src/org/jetbrains/jet/plugin/libraries/DeserializerForDecompiler.kt

@@ -56,7 +56,7 @@ public fun DeserializerForDecompiler(classFile: VirtualFile): DeserializerForDec
 
 public class DeserializerForDecompiler(val packageDirectory: VirtualFile, val directoryPackageFqName: FqName) : ResolverForDecompiler {
 
-    override fun resolveClass(classFqName: FqName) = classes(classFqName.toClassId())
+    override fun resolveTopLevelClass(classFqName: FqName) = classes(classFqName.toClassId())
 
     override fun resolveDeclarationsInPackage(packageFqName: FqName): Collection<DeclarationDescriptor> {
         assert(packageFqName == directoryPackageFqName, "Was called for $packageFqName but only $directoryPackageFqName is expected.")

idea/src/org/jetbrains/jet/plugin/libraries/ResolverForDecompiler.kt

@@ -21,6 +21,6 @@ import org.jetbrains.jet.lang.resolve.name.FqName
 import org.jetbrains.jet.lang.descriptors.ClassDescriptor
 
 trait ResolverForDecompiler {
-    fun resolveClass(classFqName: FqName): ClassDescriptor?
+    fun resolveTopLevelClass(classFqName: FqName): ClassDescriptor?
     fun resolveDeclarationsInPackage(packageFqName: FqName): Collection<DeclarationDescriptor>
 }