Bump hacking to 0.7

Change-Id: I554b85683c67dceedddc4d2376bdac43979b3cf5
Raise eventlet to 0.13.0

eventlet 0.13.0 provides the python 3.x compatible
timeout parameter in subprocess module
(https://bitbucket.org/eventlet/eventlet/issue/89)

Change-Id: I978a733e129b9e48abf4093631ae769885645a9b
Merge "Bump hacking to 0.7"
Merge "Raise eventlet to 0.13.0"