[release] Prepare for next development iteration

Change-Id: Ibc2bfdc5bbab9bbd7bd94ad191bbb7df7984a0c8
Execute requests (commands) can create sessions

Change-Id: Ic873c6caa1fbf3c5490107a9cdcba0460205882e
[release] 4.2.1

Change-Id: I43d67050ddb30d8b308e5575781cf25580713b49