Do not use protobuf serialization for FindPrimary and it's responses

FindPrimary, PrimaryFound and PrimaryNotFound are local messages so there
is no advantage to serializing and deserializing them into protobuf messages

Change-Id: Ib778c6ff10d5622276e5907292a39e77f1e72edf
Signed-off-by: Moiz Raja <moraja@cisco.com>
Get some basic unit testing in place for the RaftActor class

The two tests that were added do the following,
    - test construction
    - test finding a leader when the current raft actor is the leader

This commit also specifies the proper includes and excludes for code coverage

Change-Id: I5898c4a7f4044f13587fe5d58878d560f60e65dc
Signed-off-by: Moiz Raja <moraja@cisco.com>
Merge "Do not use protobuf serialization for FindPrimary and it's responses"
Merge "Get some basic unit testing in place for the RaftActor class"