Manually patch puppetlabs-mysql

Signed-off-by: Lance Chen <cyen0312@gmail.com>
Change rabbitmq user from guest to openstack

Since user guest does not accept connection from interface other than
loopback device, create a new user would be much easier to solve the
problem.

Reference:
Varaible `loopback_users` in https://www.rabbitmq.com/configure.html

Signed-off-by: Lance Chen <cyen0312@gmail.com>