Add missing keyword raise to get_profile_binding function

Improve corresponding unit tests.

Change-Id: I8f71ee7aa8fcafbf3ef6e3f9d4f0b89c874af73b
Closes-Bug: #1329426
Added missing core_plugins symbolic names

Some plugins miss short symbolic name in setup.cfg, specifically Nuage
and Metaplugin.

Change-Id: I0198ae98654bbdddf8f2ba8dd3b80d0d447d6341
Closes-Bug: 1324487
Merge "Add missing keyword raise to get_profile_binding function"
Merge "Added missing core_plugins symbolic names"