The baremetal rootwrap filters were removed from nova over a year ago in
change I952e484cf0b7b6526dced74769ed00a1b7541711. Remove them from this
repository as well. Also update the 'Copy nova rootwrap filter config'
task to handle looking up rootwrap filter files using 'with_fileglob' to
avoid having to maintain the task with each addition or removal of these
files.
Change-Id: I9c7df5d29f9557fbc467402166cec7546a3e79c7