Migrate from Amulet to Zaza

This patch migrate tests from Amulet to Zaza, and Python3 only.

func-test-pr: openstack-charmers/zaza-openstack-tests#55

Partial-Bug: 1828424

Change-Id: I4dacf33d3ab4dedbbe62a36b1b2ce5606e51d234
Signed-off-by: Joe Guo <guoqiao@gmail.com>

Makefile

@@ -1,16 +1,16 @@
 #!/usr/bin/make
-PYTHON := /usr/bin/env python
+PYTHON := /usr/bin/env python3
 
 lint:
 	@tox -e pep8
 
 test:
 	@echo Starting unit tests...
-	@tox -e py27
+	@tox -e py3
 
 functional_test:
 	@echo Starting functional tests...
-	@tox -e func27
+	@tox -e func
 
 bin/charm_helpers_sync.py:
 	@mkdir -p bin

scripts/glance-simplestreams-sync.py

@@ -503,7 +503,9 @@ def main():
                                       "message": "Sync starting."})
         do_sync(charm_conf, status_exchange)
         ts = time.strftime("%x %X")
-        completed_msg = "Sync completed at {}".format(ts)
+        # "Unit is ready" is one of approved message prefixes
+        # Prefix the message with it will help zaza to check.
+        completed_msg = "Unit is ready. Sync completed at {}".format(ts)
         status_exchange.send_message({"status": "Done",
                                       "message": completed_msg})
         status_set('active', completed_msg)

test-requirements.txt

@@ -1,29 +1,10 @@
-# The order of packages is significant, because pip processes them in the order
-# of appearance. Changing the order has an impact on the overall integration
-# process, which may cause wedges in the gate later.
 charm-tools>=2.4.4
+requests>=2.18.4
 coverage>=3.6
 mock>=1.2
 flake8>=2.2.4,<=2.4.1
 stestr>=2.2.0
-requests>=2.18.4
-# BEGIN: Amulet OpenStack Charm Helper Requirements
-# Liberty client lower constraints
-amulet>=1.14.3,<2.0;python_version=='2.7'
-bundletester>=0.6.1,<1.0;python_version=='2.7'
-python-ceilometerclient>=1.5.0
-python-cinderclient>=1.4.0
 python-glanceclient>=1.1.0
-python-heatclient>=0.8.0
-python-keystoneclient>=1.7.1
-python-neutronclient>=3.1.0
-python-novaclient>=2.30.1
-python-openstackclient>=1.7.0
-python-swiftclient>=2.6.0
-pika>=0.10.0,<1.0
-distro-info
-git+https://github.com/juju/charm-helpers.git#egg=charmhelpers
-# END: Amulet OpenStack Charm Helper Requirements
-# NOTE: workaround for 14.04 pip/tox
-pytz
-pyudev  # for ceph-* charm unit tests (not mocked?)
+
+git+https://github.com/openstack-charmers/zaza.git#egg=zaza;python_version>='3.0'
+git+https://github.com/openstack-charmers/zaza-openstack-tests.git#egg=zaza.openstack