Fixes get configuration defaults

Querying for the default configuration of an instance fails when
the my.cnf has keys with no values. ie 'skip-external-locking'.
To fix this, we modify the config template to include values

Change-Id: Iab96ec8cd3f8d79fe2b3946c4e9db094a3acbe93
Closes-Bug: 1285428
Initial support for single instance Couchbase

This code adds the ability to create single instance couchbase server.
No other operations supported.

Change-Id: Icaac84c64f89b07ed2e85ad5215809d04ae74ebc
Implements: blueprint couchbase-single-instance-ga
Add security group rules for Couchbase

Closes-Bug: #1287037
Change-Id: I6529930e91cfa709bd87aa0ae97b286ec65d239c
Merge "Initial support for single instance Couchbase"
Merge "Add security group rules for Couchbase"
Merge "Fixes get configuration defaults"
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