Update account generator calls with correct password
Update account generator calls with correct password

Change I380dd20e5ed716a0bdf92aa02c3730359b8136e4 updated the tempest
configuration to stop creating a bunch of globals. But as part of
that refactor it started using $admin_password as the password
argument for tempest-account generator, which is never defined.
This commit rectifies the situation by using the correct variable
$password.

Change-Id: Ieeed58751e5784020e04bcc2911ac74791662110

group-policy/devstack,samgoon/devstack,dtroyer/devstack,samgoon/devstack,bigswitch/devstack,nawawi/openstack,openstack-dev/devstack,richliu/devstack,Mahito/devstack,dtroyer/devstack,bigswitch/devstack,openstack-dev/devstack,noironetworks/devstack,group-policy/devstack,Mahito/devstack,bswartz/devstack,bswartz/devstack,richliu/devstack,nawawi/openstack,noironetworks/devstack