Add filter and filter-off suite options.

Filter only runs suite jobs that contain the text passed as part of
their description or in the names of the composite set of yaml files.
Filter-off only runs suite jobs that do not contain the text passed
as either their description or in the names of the composite set of
yaml files.
Fixes: 8954
Signed-off-by: Warren Usui <warren.usui@inktank.com>
Merge pull request #309 from ceph/wip-8954-wusui

Add filter and filter-out options to suites.