Added oslo.middleware to requirements
Added oslo.middleware to requirements

Neutron doesn't have it in their requirements for some raisin.

RM8775

asadoughi/quark,Cerberus98/quark,insequent/quark,alanquillin/quark,Cerberus98/quark,asadoughi/quark,roaet/quark,insequent/quark,alanquillin/quark,roaet/quark,lmaycotte/quark,rackerlabs/quark,rackerlabs/quark,lmaycotte/quark