correspondence between CallableDescriptorCollector and CallTransformer (special treatment only for function invocations)

'getNonMembersByName' instead of 'getExtensionsByName' not to throw out invocation of variables with members-extensions

changed CallTransformer responsible for resolving second call ('invoke') for 'variable as function' case

 #KT-1863 In progress

Reverting c9edaa6b

we should probably add alt-header for java.lang.Object that specifies
return type of Object.toString to String (without ?)

(it is safer)

like

Aaa<B extends Bbb<C>, C>

#KT-1731 fixed

 To achieve the desired result, in your run configuration add an environment variable named kotlin.tests.actually.compile and set it to "NO!"

This should be an error, but there is an issue with Java interop: Java parameters may change names or not have them.

 KT-1558 Fixed

A value parameter _declares _a default value when the value is explicitly provided in the declaration of the parameter.
A value parameter _has_ a default value when it declares a default value or an overridden function declares it for the same parameter

The test is supposed to check classes and objects