Add ini_manage module.

This is to support salt 2014.1, as the module is not supported in that version yet.

This is copied from https://github.com/CSSCorp/openstack-automation/blob/icehouse-json/Openstack_Havana/file/_modules/ini_manage.py
Implemented mysql init sls.

This is currently a copy of https://github.com/CSSCorp/openstack-automation/blob/icehouse-json/Openstack_Havana/file/mysql/init.sls
Added ini_manage state.

Copied from https://github.com/CSSCorp/openstack-automation/blob/icehouse-json/Openstack_Havana/file/_states/ini_manage.py

Also renamed template dir to openstack
Started pillar example with mysql credentials
Add rabbitmq state
Use the virtual ini function
Fixed virtual function
Require mysql package for mysql service
Add keystone init sls
Add mysql.schema sls
Some fixes from testing
Completed schema sls
Added client sls for python-mysqldb
Fixed mysql_user requirement
Fixed database name in mysql grant
Populated keystone state
Finished keystone init sls
Remove mysql grants requirement
Updated pillar example
Added keystone state module