[release] Prepare for next development iteration

Change-Id: Id1e50908be97658da6502298551a3162b4da02f4
Several OAuth bug fixes and improved logging

Change-Id: Ic6793f207c58a60d493e21633e4e23ca48029ed4
Fix several warnings and remove Kurento init to avoid double websocket handler registration

Change-Id: I4bf47d91349991e7dd4c00df2123df60efb3195c
Fix bug when there is not configured keystone host

Change-Id: I374e808e52db7f015845ab1197bd21c00a9fd572
Improve logs, format and clean up

Change-Id: I89a19c76d7e3f07d66bad11fc1df584de59e32a3
[release] Prepare release 4.2.0

Change-Id: I775b8f1398f7f96e476bc9b8aec664a4201f79f6