Release sync for 20.08

- Classic charms: sync charm-helpers.
- Classic ceph based charms:  also sync charms.ceph
- Reactive charms: trigger a rebuild
- sync tox.ini
- sync requirements.txt and test-requirements.txt

Change-Id: I195b4aece426c7dfd6cd112b9bfbd765eecfc8eb

rebuild

@@ -2,4 +2,4 @@
 # when dependencies of the charm change,
 # but nothing in the charm needs to.
 # simply change the uuid to something new
-88648d6c-b6df-11ea-aa46-d750d869fb58
+d9b599de-d02c-11ea-b2e7-efb42d979d37

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/openstack-charmers/zaza-openstack-tests.git#egg=zaza.openstack

test-requirements.txt

@@ -1,9 +1,10 @@
-# This file is managed centrally.  If you find the need to modify this as a
-# one-off, please don't.  Intead, consult #openstack-charms and ask about
-# requirements management in charms via bot-control.  Thank you.
+# 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
-flake8>=2.2.4
+flake8>=2.2.4,<=2.4.1
 stestr>=2.2.0
 requests>=2.18.4
 charms.reactive
@@ -11,3 +12,12 @@ 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

tox.ini

@@ -50,6 +50,11 @@ basepython = python3.7
 deps = -r{toxinidir}/test-requirements.txt
 commands = stestr run --slowest {posargs}
 
+[testenv:py38]
+basepython = python3.8
+deps = -r{toxinidir}/test-requirements.txt
+commands = stestr run --slowest {posargs}
+
 [testenv:pep8]
 basepython = python3
 deps = -r{toxinidir}/test-requirements.txt