Change-Id: If2b71a1f7224ed3837fcfe8b4a0b8ef858e1f842

Juju 2.0 provides support for display of the version of
an application deployed by a charm in juju status.

Insert the os_application_version_set function into the
existing assess_status function - this gets called after
all hook executions, and periodically after that, so any
changes in package versions due to normal system updates
will also be reflected in the status output.

This review also includes a resync of charm-helpers to
pickup hookenv and contrib.openstack support for this
feature.

Change-Id: I5734e87d39e62c1fb791b0b79ff216e30a784d1f

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

Add charmhelpers.contrib.hardening and calls to install,
config-changed, upgrade-charm and update-status hooks. Also
add new config option to allow one or more hardening
modules to be applied at runtime.

Change-Id: I5f85699adcb5c37ffcda971a3ed5f1f965fd7fb6

of charm-helpers to test that modification will work - this is for demo
purposes only and will be revised prior to merge proposal.

Also changed tests to to work with revision 514:
"misc changes for haproxy template and context ..."
which required changes to the test_haproxy_context_service_enabled test
in unit_tests/test_keystone_contexts.py

Fix SSL injection for ca/cert/key provided by config.

Change format of openstack-origin-yaml, use try/except in action, use git_src_dir in post install, update amulet tests.