Bug-2508: Switch PCEP topology provider to use pingpong-binding-data-broker

-changed initial config file, pingpong-binding-data-broker instance is now injected as data-broker
-the change increases performance

Change-Id: Ib06b0d5e68926d648110e004960e46d5ee5dd707
Signed-off-by: Milos Fabian <milfabia@cisco.com>