Source code import of enum literal value

Add parameter value to Import_Utils::addEnumLiteral.
Remove old unused parameter comment.
Parse enum literal value in C++ and Csharp import.
Pascal, and Java don't support enum value directly.
Add C++ and Csharp testcases.

FIXED-IN:2.18.80 (KDE Applications 16.03.80)
REVIEW:127000