Bug 1093: Extracted static inner classes from SchemaAwareRpcBroker.

Change-Id: I68bc1d3e4a3b279877e5ece19bcc9e1bfcd0c3dc
Signed-off-by: Tony Tkacik <ttkacik@cisco.com>
Merge "Bug 1093: Extracted static inner classes from SchemaAwareRpcBroker."