Skip hidden files while traversion rootwrap filters
Skip hidden files while traversion rootwrap filters

Hidden files are usually leftovers (like .e.g. .filter.conf~),
don't handle them.

Change-Id: I194341dfd33632fb8a2e8db89cf74fb79d6aa318

JioCloud/oslo-incubator,JioCloud/oslo-incubator,JioCloud/oslo-incubator