[ussuri][goal] Drop python 2.7 support and testing

OpenStack is dropping the py2.7 support in ussuri cycle.

patrole is ready with python 3 and ok to drop the
python 2.7 support.

Complete discussion & schedule can be found in
- http://lists.openstack.org/pipermail/openstack-discuss/2019-October/010142.html
- https://etherpad.openstack.org/p/drop-python2-support

Ussuri Communtiy-wide goal:
https://governance.openstack.org/tc/goals/selected/ussuri/drop-py27.html

Change-Id: Ied5cfb29363401d713c21fc579f30e1ef9c1210f
diff --git a/releasenotes/notes/drop-py-2-7-d287ad9a325b132d.yaml b/releasenotes/notes/drop-py-2-7-d287ad9a325b132d.yaml
new file mode 100644
index 0000000..75accc1
--- /dev/null
+++ b/releasenotes/notes/drop-py-2-7-d287ad9a325b132d.yaml
@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    Python 2.7 support has been dropped. Last release of patrole
+    to support python 2.7 is patrole 0.8.0. The minimum version of Python now
+    supported by Patrole is Python 3.6.