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: Ie94f24d71bac5d84a4a4c695e308926af024fec0

requirements.txt

@@ -7,6 +7,7 @@
 #       requirements.  They are intertwined.  Also, Zaza itself should specify
 #       all of its own requirements and if it doesn't, fix it there.
 #
+setuptools<50.0.0  # https://github.com/pypa/setuptools/commit/04e3df22df840c6bb244e9b27bc56750c44b7c85
 pbr>=1.8.0,<1.9.0
 simplejson>=2.2.0
 netifaces>=0.10.4

test-requirements.txt

@@ -7,10 +7,11 @@
 #       requirements.  They are intertwined.  Also, Zaza itself should specify
 #       all of its own requirements and if it doesn't, fix it there.
 #
+setuptools<50.0.0  # https://github.com/pypa/setuptools/commit/04e3df22df840c6bb244e9b27bc56750c44b7c85
 charm-tools>=2.4.4
 requests>=2.18.4
 mock>=1.2
-flake8>=2.2.4,<=2.4.1
+flake8>=2.2.4
 stestr>=2.2.0
 coverage>=4.5.2
 pyudev              # for ceph-* charm unit tests (need to fix the ceph-* charm unit tests/mocking)

tox.ini

@@ -116,5 +116,5 @@ commands =
     functest-run-suite --keep-model --bundle {posargs}
 
 [flake8]
-ignore = E402,E226
+ignore = E402,E226,W503,W504
 exclude = */charmhelpers