Drop lower constraints testing

Projects like oslo are dropping lower constraints
testing. There is also discussion to drop it until
we find a proper setup. For details, please follow
the ML thread. TC will have updates soon.

http://lists.openstack.org/pipermail/openstack-discuss/2021-January/019679.html

story: 2008482
task: 41523

Addionally in train, cap bandit.
Similar to https://review.opendev.org/c/openstack/nova/+/766171



Drop releasenote jobs from check and gate.

Change-Id: Ia91451c0f93ffe4c7a555874f8f843e01b146df5
Signed-off-by: Spyros Trigazis <spyridon.trigazis@cern.ch>
(cherry picked from commit 2fa68f12)

.zuul.yaml

 - project:
     templates:
       - check-requirements
-      - openstack-lower-constraints-jobs
       - openstack-python-jobs
       - openstack-python3-train-jobs
       - publish-openstack-docs-pti
-    check:
-      jobs:
-        - build-openstack-releasenotes
-        - openstack-tox-cover:
-            voting: false
-    gate:
-      jobs:
-        - build-openstack-releasenotes
+      - release-notes-jobs-python3

test-requirements.txt

@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
-bandit!=1.6.0,>=1.1.0 # Apache-2.0
+bandit>=1.1.0,<=1.6.2 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 python-openstackclient>=3.12.0 # Apache-2.0