* Wait for socket to be open

* Fix call on null

* Allow DB access for MountProviderTest

Makes unit tests pass when using object store, since their FS access is
actually oc_filecache DB access. It is currently not possible to mock
or bypass the logic from "SharedMount::verifyMountPoint()" triggered by
this test.

docker containers should be stopped before being removed - refs https://github.com/docker/docker/issues/18758

use default config for swift primary storage test config

allow testsuite to complete

fix timeout, script cleanup, enable debug for now

use btrfs loopback device, requires privileged container and absolute path

throw exception when storage has problems

debug by echo ...

sleep more, more debug