aaa: Removal of authenticator classes

The methods are consolidated to the Authenticator class

Topic: AAA
Change-Id: If3a6f8586bdb14fcc6c09c77dc1b761b795fce07
Signed-off-by: Yair Zaslavsky <yzaslavs@redhat.com>
aaa: Removal of old Internal broker

Internal Authenticator and directory should be used.
Instead, ProvisionalDirectory uses an InternalBroker for the
"internal" domain.
This is fixed in this patch.

Topic: AAA
Change-Id: I3fe72ff0fcdac425a28646d9850cc56cc0a7c058
Signed-off-by: Yair Zaslavsky <yzaslavs@redhat.com>