Raise max header size to accommodate large tokens

The max header is exceeded in the following scenario
- Auth tokens built with a keystone v3 API catalog
- A catalog with approximately 8 or more endpoints defined

An equivalent fix will be required for all projects which use
eventlet.wsgi.

Closes-Bug: #1190149

Change-Id: Ia0882e43395f1025137173b51aab147433b54255
simplify dns_ip_address code

'ips' would be False when it is None or empty

Closes-Bug: #1287086

Change-Id: I70d831865af16bfeee969b7927edd6ccc7d2aa11
Merge "Raise max header size to accommodate large tokens"
Adding percona secgroup config

Removing duplicate code around datastore specific configs

Change-Id: I32167b8f9494521a3a2afe125c68db3905a3be53
Closes-Bug: 1287315
Fix inconsistent usage of mount_point

Reasons:
- multiple datastores;
- inconsistent usage of mount_point at
taskmanager and guestagent;

Changes:
- oslo groups;
- mount point per datastore;
- guest API not changed.

Change-Id: I8044789c6ab2ed837ff0e1b16183dfeafbf955bb
Closes-Bug: #1248212
Merge "simplify dns_ip_address code"
WIP Add point in time recovery

Changes:
 - adding ability to perform point
   in time recovery from full backup;

Change-Id: Ib29773ff31cd4be40bbb596aae2deddb0bcd54bb
Implements: blueprint mysql-point-in-time-recovery