Updates for testing period for 20.01 release

Includes updates to charmhelpers/charms.openstack for cert_utils
and unit-get for the install hook error on Juju 2.9

* charm-helpers sync for classic charms
* rebuild for reactive charms
* ensure tox.ini is from release-tools
* ensure requirements.txt files are from release-tools
* On reactive charms:
  - ensure master branch for charms.openstack
  - ensure master branch for charm-helpers

Change-Id: Ib7ef820804dc6a47ae5efdfbe4b3aa681103046a

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
-5005e1ba-0e2c-11eb-9990-bfde8811b245
+82eeb69e-5745-11eb-a017-1bac08bb14fb

src/wheelhouse.txt

@@ -1,3 +1,7 @@
 cryptography
 lxml
 psutil
+
+git+https://opendev.org/openstack/charms.openstack.git#egg=charms.openstack
+
+git+https://github.com/juju/charm-helpers.git#egg=charmhelpers

test-requirements.txt

@@ -22,6 +22,8 @@ importlib-resources<3.0.0; python_version < '3.6'
 # dropped support for python 3.5:
 osprofiler<2.7.0;python_version<'3.6'
 stevedore<1.31.0;python_version<'3.6'
+debtcollector<1.22.0;python_version<'3.6'
+oslo.utils<=3.41.0;python_version<'3.6'
 
 requests>=2.18.4
 charms.reactive