* new Plugin Catalyst/Plugin/NGCP/RealmCookie.pm
that extends Catalyst::Plugin::Session::State::Cookie
and overloads methods responsible for cookie_name creation.
It uses NGCP_REALM fastcgi header to append it to the cookie name.
Empty cookie with name "appprefix"_session is suppressed on Session
pre-setup.
* Base cookie_name is now set to 'ngcp-panel'
Change-Id: I6b4c10c5e1728d0dd7a6398bf5191925d5b904f6