Upgdade requests to 2.2.1
Upgdade requests to 2.2.1

Change-Id: I2ff6b5fcd4460ceaa4db9dcde6832719f2557c7e

dpursehouse/pygerrit2,sonyxperiadev/pygerrit,morucci/pygerrit,dpursehouse/pygerrit,gferon/pygerrit2,benjiii/pygerrit,markon/pygerrit2