Removed SQL password in sql_connection for compute hosts

Change-Id: I0cfa9a92cef0aabfa346db4f2fe6ede3aed4eada
Fixes: rhbz#966325
Merge "Removed SQL password in sql_connection for compute hosts"
Added submodule update to release.sh

Change-Id: I50314153673bb1e061c80e369214ed25ac3bd5f1
Merge "Added submodule update to release.sh"