Align test requirements

Ensure test requirements are aligned with other reactive charms.

Change-Id: I5e0d04e415fb47e060de24dd8674b6c8c6c05ed9

test-requirements.txt

@@ -1,5 +1,38 @@
+# 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
+#
+pyparsing<3.0.0  # aodhclient is pinned in zaza and needs pyparsing < 3.0.0, but cffi also needs it, so pin here.
+setuptools<50.0.0  # https://github.com/pypa/setuptools/commit/04e3df22df840c6bb244e9b27bc56750c44b7c85
+
 stestr>=2.2.0
-coverage>=3.6
 
+# Dependency of stestr. Workaround for
+# https://github.com/mtreinish/stestr/issues/145
+cliff<3.0.0
+
+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:
+#
+# NOTE(lourot): newer versions of cryptography require a Rust compiler to build,
+# see
+# * https://github.com/openstack-charmers/zaza/issues/421
+# * https://mail.python.org/pipermail/cryptography-dev/2021-January/001003.html
+#
+netifaces        # vault
+psycopg2-binary  # vault
+tenacity         # vault
+pbr==5.6.0       # vault
+cryptography<3.4 # vault, keystone-saml-mellon
+lxml             # keystone-saml-mellon
+hvac             # vault, barbican-vault
+psutil           # cinder-lvm