Fix password not strong enough for cmd
Fix password not strong enough for cmd

Also uses strong passwords for cmd/accout_generator.py.

Change-Id: I44486414e075a8abaebf8371c4c94c908f156ea0
Related-Bug: 1448217

sebrandon1/tempest,cisco-openstack/tempest,bigswitch/tempest,Tesora/tesora-tempest,sebrandon1/tempest,Juniper/tempest,zsoltdudas/lis-tempest,bigswitch/tempest,openstack/tempest,LIS/lis-tempest,cisco-openstack/tempest,zsoltdudas/lis-tempest,Juniper/tempest,openstack/tempest,masayukig/tempest,Tesora/tesora-tempest,masayukig/tempest,LIS/lis-tempest,vedujoshi/tempest,vedujoshi/tempest