The current workload does not the new servers using the pre-allocated
IPs, in some situation, it will be hard to getting floating IPs.
This patch will allow a runner to pre-allocating some IPs, then assign
IPs to the server they like.
Change-Id: I992edb95d5d641983908f38340bb8ed546fc72aa
1. mysql 5.6+ configuration
2. noting supporting ubuntu 16.xx
3. different platform code mixing
4. tags so that you can run selected tasks by role
5. uses openstack superuser theme and posts
6. haproxy used old configuration format
Closes-Bug #1654240
Closes-Bug #1649949
Change-Id: Ibbde92ed4fc18f85d004d54f00d3547c3df8fcc4