Discover class objects for light class generation in the compiler

 #KT-3337 In Progress
LightClasses: class object's property getter unresolved in Java, but compiles OK
Class object FqNames indexed properly

#KT-3337 In Progress
LightClasses: class object's property getter unresolved in Java, but compiles OK
Tests for Java name resolution in the IDE

#KT-3337 In Progress
LightClasses: class object's property getter unresolved in Java, but compiles OK
PsiJetStubWithFqName interface extracted