This PR changes the owner of the file used by the docker container that
resets the mysql root password.
Original problem is the failure to restore mysql:5.7.x backup. The error
occurs because the container process tries to update the file that owned
by the others.
Story: 2010467
Task: 47017
Change-Id: I3d8ebaac4ee5e13af83c305ce28b51e4442d8c8b