BUG-1143: binding-generator-impl: tests refactoring.

Optimalized existing tests, removed useless test files.

Change-Id: I5dbe03b66b6d3251b87bc9eb1f1c89ebe6f03c3d
Signed-off-by: Martin Vitez <mvitez@cisco.com>
Merge "BUG-1143: binding-generator-impl: tests refactoring."