Fix return from schedule_suite.

Schedule_suite returns the number of jobs scheduled (accounting for
filters).  Information displayed also indicates how many jobs were
run and how many were filtered out.

Fixes: 9183
Signed-off-by: Warren Usui <warren.usui@inktank.com>
Merge pull request #316 from ceph/wip-9183-wusui

Fix return from schedule_suite.
Add --suite-path

Slightly less ugly than setting PYTHONPATH

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
nuke: clear test firewall rules

Signed-off-by: John Spray <john.spray@redhat.com>
daemon: add DaemonGroup.resolve_role_list

Used for tasks that want to take a flexible list
of roles from their user config, including a
null (everything) default and * wildcards.

Signed-off-by: John Spray <john.spray@redhat.com>