Process imports for functioncs and properties in creating scope for file

during lazy resolve

Fix for "KT-3096 No completion in function literal" and "KT-3102 No
completion/auto-import for an extension method"

 #KT-3102 Fixed
 #KT-3096 Fixed

idea/testData/completion/basic/multifile/ExtensionFunctionOnImportedFunction-1.kt

@@ -0,0 +1,9 @@
+package first
+
+// For KT-3102
+
+import second.foo
+
+fun test() = foo().ext<caret>
+
+// EXIST: extensionFunction1, extensionFunction2