CLOUDSTACK-4384: Switch back to CLOUD_DB after simulator processing

Simulator should revert back to CLOUD_DB after its operations on
SIMULATOR_DB or the cloudstack connections go to the simulator instead
of cloud.

Signed-off-by: Prasanna Santhanam <tsp@apache.org>
(cherry picked from commit 3d39716c8fed2b27edbd4475a7e0915b1200123c)
CLOUDSTACK-1316 location of cloud-set-guest-password updated