Sync libraries & common files prior to freeze

* charm-helpers sync for classic charms
* charms.ceph sync for ceph charms
* rebuild for reactive charms
* sync tox.ini files as needed
* sync requirements.txt files to sync to standard

Change-Id: Ibfd4f59f61ed93bd36ebe786f52ef2b3c7d0fef1

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
-d9e0b2f4-d02c-11ea-82d8-7f5c74534cca
+89c2a27c-0016-11eb-9a58-6bcdef6940f6

requirements.txt

@@ -3,6 +3,7 @@
 # choices of *requirements.txt files for OpenStack Charms:
 #     https://github.com/openstack-charmers/release-tools
 #
+setuptools<50.0.0  # https://github.com/pypa/setuptools/commit/04e3df22df840c6bb244e9b27bc56750c44b7c85
 # Build requirements
 charm-tools>=2.4.4
 # importlib-resources 1.1.0 removed Python 3.5 support

test-requirements.txt

@@ -3,8 +3,9 @@
 # choices of *requirements.txt files for OpenStack Charms:
 #     https://github.com/openstack-charmers/release-tools
 #
+setuptools<50.0.0  # https://github.com/pypa/setuptools/commit/04e3df22df840c6bb244e9b27bc56750c44b7c85
 # Lint and unit test requirements
-flake8>=2.2.4,<=2.4.1
+flake8>=2.2.4
 stestr>=2.2.0
 requests>=2.18.4
 charms.reactive

tox.ini

@@ -94,4 +94,4 @@ commands = {posargs}
 
 [flake8]
 # E402 ignore necessary for path append before sys module import in actions
-ignore = E402,W504
+ignore = E402,W503,W504

unit_tests/__init__.py

@@ -15,9 +15,11 @@
 import sys
 import mock
 
+
 sys.path.append('src')
 sys.path.append('src/lib')
 
+
 # Mock out charmhelpers so that we can test without it.
 import charms_openstack.test_mocks  # noqa
 charms_openstack.test_mocks.mock_charmhelpers()
@@ -32,6 +34,7 @@ def _fake_retry(num_retries, base_delay=0, exc_type=Exception):
         return _retry_on_exception_inner_2
     return _retry_on_exception_inner_1
 
+
 mock.patch(
     'charmhelpers.core.decorators.retry_on_exception',
     _fake_retry).start()