[release] Prepare for next development iteration

Change-Id: I2e0bb2d3f724d91bcd7ebb131fc35342097073cf
Retry when a transport error is received while sending a request

Change-Id: I814ea242e18c41d4e93aac824f3243aaedf2db29
[release] 4.2.1

Change-Id: Ie687343e6a0fd03c3e0c9cb5e0909673988df71a