Merge bierman02-auth and bierman02-base features

Merge bierman02-auth and bierman02-base features

We do not need odl-restconf-nb-bierman02-base feature now. It is
bierman-02 restconf implementations and used to be pulled by both
bierman02-auth and bierman02-noauth features. These two features just
initialized the web application (with or without authentication).

Since bierman02-noauth is no longer with us, merge remaining two
features into odl-restconf-nb-bierman02 feature.

Change-Id: I121e3c109ca1b5f60aac66e76af011cef0774f7d
Signed-off-by: Jakub Morvay <jmorvay@frinx.io>