Added missing sudo when killing ns-metadata

Closes-bug: #1269982
Change-Id: Ib6b641a8d5c92fb4a8aaed6b5d7b63e66acd6bd9
Merge "Added missing sudo when killing ns-metadata"
Merge commit 'refs/changes/97/61397/2' of git://gold.eng.hq.xensource.com/git/github/openstack-dev/devstack into tmpbranch
Merge commit 'refs/changes/22/61422/2' of git://gold.eng.hq.xensource.com/git/github/openstack-dev/devstack into tmpbranch
Merge commit 'refs/changes/36/68136/1' of git://gold.eng.hq.xensource.com/git/github/openstack-dev/devstack into tmpbranch