[kurento-control-server] Refactor ControlServerException to
KurentoControlServerException

Change-Id: Idabe1b942e5d350ee4d85d6b87ec2391d80b625c
New Json format config file for KurentoControlServer and several
cleanups

Change-Id: Ie2c1fe1f42d4da4c4f7996b3b6da1e9db2386e4d