set ssl options for glance-registry

lets you set the ssl cert, key, ca for secure registry
connection.

Conflicts in manifests/registry.pp solved

Change-Id: Ic0ab88ef14ea61fd42b2bc1811ca1b5a4180b4a4
backport: havana
(cherry picked from commit 5182c5cd782e408192932a30ac03a21676ba7ba2)