Remove the selector from the top bar

Since Tuskar-UI is going to be used in an environment where
the selector doesn't make any sense and is useless, we can
remove it. I do it by overriding the definitions for template
tags that are used to generate it.

Change-Id: I57abc9df5dbf5219ef10ea2f03ca3538d110d427
Merge "Remove the selector from the top bar"