Fix reading of EntityOwnerSelectionStrategy

Fix reading of EntityOwnerSelectionStrategy

1. The pid used for reading a config admin file should not have hyphens
   so replaced them with dots
2. The config admin returns properties that are not from the file
   so we need a way to ignore them. I specifically look for the
   a prefix of "entity.type." and ignore the other properties

Change-Id: I26a66176583ec39cbdb78fec749022429218e005
Signed-off-by: Moiz Raja <moraja@cisco.com>
(cherry picked from commit 7030ae1a3c8fcc19e2b88d874a18faf73496682e)