Bug 4957 OpenflowPluginProviderImpl.close() fixing

Bug 4957 OpenflowPluginProviderImpl.close() fixing

 - added close invocation of all underlying managers
 - added TODOs for later reconsideration
 - OFPlugin-Li closing process has to wait for cleaning OperDS
   so we could have unclosed (MASTER) instances in context of
   RoleManager. Fist step was merge OpenflowOwnershipListener
   with RoleManager because Manager is here for managing
   all not finished RoleCtx.
   Second step was unregistred new OwnershipListener (RoleManager)
   as OwnershipListener and for every undstanding RoleCtx ask
   OwnershipService for actual state. If the Entity is still
   registred, NOOP otherwise clean OperDS.

Change-Id: Ie041d6e0fb02b153850d8c9645740cf1164b6ac5
Signed-off-by: Jozef Bacigal <jbacigal@cisco.com>