Bind to all interfaces for MongoDB

The existing config.template binds to 127.0.0.1 but the status check
uses operating_system.get_ip_address(). It works now because during
prepare the bind_ip is substituted. However, during operations like
start_db_with_conf_changes and reset_configuration, the substitution
does not occur causing the guest agent to show the service as SHUTDOWN.

Change-Id: I137471c6ee2652eac8a0e787098e04fb468f9828
Closes-Bug: #1312346
Merge "Bind to all interfaces for MongoDB"