No-impact (besides satisfying my inner grammarian) change to exercise
gerrit workflow.

Change-Id: I962b9f202d650084d31e8f2258a8f0cdc5a8596a

The README documentation implies that use-https and
https-service-endpoints are required when enabling SSL/https
with your own CA, SSL cert, and key. Update the README and
config.yaml to explain that config options use-https and
https-service-endpoints should not be set when using ssl_*
config options.

Change-Id: I2e0140f909ef2c57182895f37cf191b6bc80157b
Closes-Bug: #1754682

A trivial change to test gerrit setup.

Change-Id: I7883eb1edd53fd3bd29dc878c667397ba6b4506a

ssl_ca is not necessary when ssl_cert is signed by
a trusted CA, such as GeoTrust, because a trusted
cert chain is in the system already. Users can just
provide ssl_cert and ssl_key to enable SSL endpoint
in that case.

Closes-Bug: #1711354
Change-Id: I4a34df1a2c2bf5705e02b713d968a22f4bbf57cf

Also fix and improve the README on https in the keystone charm.

Change-Id: I42e12d8d0c159e9f2d66523b17d144c1e912e676
Closes-Bug: 1647193

Implement DNS high availability. Pass the correct information to
hacluster to register a DNS entry with MAAS 2.0 or greater rather
than using a virtual IP.

Charm-helpers sync to bring in DNS HA helpers

Change-Id: I62bb49fbaebdd3c787f96f4b6ad107f8e3e368a7

openstack-origin-git currently only supports YAML that specifies
the git repositories to deploy from.

This adds support for default openstack-origin-git values. The
default values supported are: icehouse, kilo, liberty, mitaka,
and master.  For example: openstack-origin-git=master.

Change-Id: I03839dc0abfb7465578cbb4eedfdab5043d053e6

Charms use this relation to obtain keystone credentials without
creating a service catalog entry. Set 'username' only on the relation
and keystone will set defaults and return authentication details.

Possible relation settings:
username: Username to be created.
project: Project (tenant) name to be created. Defaults to services
         project.
requested_roles: Comma delimited list of roles to be created
requested_grants: Comma delimited list of roles to be granted.
                  Defaults to Admin role.
domain: Keystone v3 domain the user will be created in.
        Defaults to the Default domain.

Change-Id: I465d2273560d86752d1bfc7497a9139a9604f814

To ensure that the charm presents the right IP address for
accessing the MySQL database over the shared-db relation,
ensure that any network space binding provided by the user
is preferred over the default of 'private-address'.

If network spaces is not supported (juju < 2.0), fallback to
using 'private-address'.

Change-Id: Ic2ed5d2cb88084c8eab33326bc16eb700ae9a35f

Juju 2.0 provides support for network spaces, allowing
charm authors to support direct binding of relations and
extra-bindings onto underlying network spaces.

Resync charm-helpers to pickup support in API endpoint
resolution code and add API extra-bindings to the charm
metadata.

Change-Id: I802eeb236930a3f2f2dbb0c9260f407adcd1d5bd