misc: add gerrit integration

Add zuul configuration.

Add gitreview configuration.

Add custom status check to ensure charm units remain in a blocked
state until the nfs-shares configuration option is set.

Change-Id: I01257c143109865adf3c88e687da3c8d440eff81

.gitreview

@@ -0,0 +1,4 @@
+[gerrit]
+host=review.opendev.org
+port=29418
+project=openstack/charm-trilio-data-mover.git

.zuul.yaml

@@ -0,0 +1,5 @@
+- project:
+    templates:
+      - python35-charm-jobs
+      - openstack-python3-ussuri-jobs
+      - openstack-cover-jobs

requirements.txt

@@ -1,10 +1,3 @@
-# This file is managed centrally by release-tools and should not be modified
-# within individual charm repos.  See the 'global' dir contents for available
-# choices of *requirements.txt files for OpenStack Charms:
-#     https://github.com/openstack-charmers/release-tools
-#
-# Build requirements
-charm-tools>=2.4.4
-# importlib-resources 1.1.0 removed Python 3.5 support
-importlib-resources<1.1.0
+# Requirements to build the charm
+charm-tools
 simplejson

src/lib/charm/openstack/trilio_dm.py

@@ -134,3 +134,9 @@ class TrilioDataMoverCharm(charms_openstack.charm.OpenStackCharm):
             os.mkdir(ghost_share_path)
 
         host.mount(nfs_share_path, ghost_share_path, options="bind")
+
+    def custom_assess_status_check(self):
+        """Check required configuration options are set"""
+        if not hookenv.config("nfs-shares"):
+            return "blocked", "nfs-shares configuration not set"
+        return None, None

src/test-requirements.txt

@@ -5,4 +5,4 @@
 #
 # Functional Test Requirements (let Zaza's dependencies solve all dependencies here!)
 git+https://github.com/openstack-charmers/zaza.git#egg=zaza
-git+https://github.com/openstack-charmers/zaza-openstack-tests.git#egg=zaza.openstack
+git+https://github.com/javacruft/zaza-openstack-tests.git@triliovault-testing#egg=zaza.openstack

test-requirements.txt

@@ -1,23 +1,7 @@
-# This file is managed centrally by release-tools and should not be modified
-# within individual charm repos.  See the 'global' dir contents for available
-# choices of *requirements.txt files for OpenStack Charms:
-#     https://github.com/openstack-charmers/release-tools
-#
-# Lint and unit test requirements
+# Unit test requirements
 flake8>=2.2.4
 stestr>=2.2.0
-requests>=2.18.4
 charms.reactive
 mock>=1.2
-nose>=1.3.7
 coverage>=3.6
-git+https://github.com/openstack/charms.openstack.git#egg=charms.openstack
-#
-# Revisit for removal / mock improvement:
-netifaces        # vault
-psycopg2-binary  # vault
-tenacity         # vault
-pbr              # vault
-cryptography     # vault, keystone-saml-mellon
-lxml             # keystone-saml-mellon
-hvac             # vault, barbican-vault
+git+https://github.com/openstack/charms.openstack#egg=charms.openstack