Adding liberty versions of oslo to requirements.txt
Adding liberty versions of oslo to requirements.txt

Change-Id: I2aba39f64af722341bad8b4e54c55c942ec857e1

openstack/monasca-common,stackforge/monasca-common,stackforge/monasca-common,openstack/monasca-common,openstack/monasca-common,stackforge/monasca-common