Remove KeypairManager.get monkey patch
Remove KeypairManager.get monkey patch

Now that we dep on novaclient >= 2.14.0, which includes this patch, we
no longer need to carry it.

Change-Id: I35514d0d08efd77d4b9ae5a4563de487e8dc29e5

crobby/sahara,zhujzhuo/Sahara,esikachev/scenario,zhangjunli177/sahara,esikachev/sahara-backup,egafford/sahara,ekasitk/sahara,mapr/sahara,keedio/sahara,tellesnobrega/sahara,keedio/sahara,keedio/sahara,xme1226/sahara,zhangjunli177/sahara,xme1226/sahara,mapr/sahara,redhat-openstack/sahara,bigfootproject/sahara,redhat-openstack/sahara,zhangjunli177/sahara,henaras/sahara,zhujzhuo/Sahara,esikachev/sahara-backup,bigfootproject/sahara,openstack/sahara,egafford/sahara,ekasitk/sahara,citrix-openstack-build/sahara,bigfootproject/sahara,zhujzhuo/Sahara,crobby/sahara,matips/iosr-2015,citrix-openstack-build/sahara,matips/iosr-2015,ekasitk/sahara,esikachev/sahara-backup,esikachev/scenario,henaras/sahara,mapr/sahara,henaras/sahara,tellesnobrega/storm_plugin,crobby/sahara,esikachev/scenario,tellesnobrega/storm_plugin,xme1226/sahara,tellesnobrega/sahara,tellesnobrega/storm_plugin,openstack/sahara,matips/iosr-2015,citrix-openstack-build/sahara,redhat-openstack/sahara