ansible/ansible-modules-core — pull request #393 by sassman (2014-11-26 12:45:53+00:00)
Title: extend Amazon RDS to support reboot of a db instance with wait capabilities

the use case behind is:

a modify of a parameter group, even if applied immediately, would require a reboot of the machine to get applied fully.

Since boto supports reboot but ansible not, it was just logical to extend it for a specific "reboot" command.
The wait behavior is supported for reboot as well.