Sync with global requirements

Change-Id: Iedcd361437745990ec2dc74ba33aceb145c1bf62
Unused pylint requirement removed

Change-Id: I3703f234f74eca5edba890efe2b21daef1936ca4
py33 and pypy added to the envlist

Change-Id: Ie61f16c09522f9d6e5e82c5c5e59628e4e7971b5