qa: convert mount calls to mount_wait

qa: convert mount calls to mount_wait

These tests want to immediately use the mount anyway. But the main
problem is, without waiting for the mount to complete, the command:

    chmod 1777 /path/to/mount

is not run so the mount cannot be written to by normal users without
sudo.

Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
(cherry picked from commit 4fc4ccb7a112e16f564cbc01a3ced8d2b6be2d68)