Revert "Make rolling-upgrade job non-voting until virtualenv problem is solved"
Revert "Make rolling-upgrade job non-voting until virtualenv problem is solved"

This reverts commit cd4ba90cc1a13c94e2a02f1af015e20d6882e05f.

The virtualenv problem seems to have been resolved.

Change-Id: Icae429b4eba796328e767317e204ca30cc105da8

openstack/swift,swiftstack/swift,swiftstack/swift,swiftstack/swift,tipabu/swift,tipabu/swift,openstack/swift,openstack/swift,openstack/swift,tipabu/swift,tipabu/swift