Revert upper-constraint of paramiko to release 2.9.1

This partially reverts [1], as paramiko-2.9.1 caused
issues in tempest jobs where cirros image is used[1].
Also u-c updates are not getting testing so would also
need [3] to get it fixed.

To get [3] land we would need to merge this requirements
change first and hence switch tempest-full job non-voting
and removing from gate pipeline.

[1] https://review.opendev.org/c/openstack/requirements/+/822575
[2] https://github.com/cirros-dev/cirros/issues/74
[3] https://review.opendev.org/c/openstack/devstack/+/823127

Change-Id: I62350b017f91f827b7a20c78b8c4fee9113d659f

.zuul.d/project.yaml

@@ -51,6 +51,7 @@
         - openstack-tox-py36
         - openstacksdk-functional-devstack
         - tempest-full-py3:
+            voting: false
             irrelevant-files:
               - ^(test-|)requirements.txt$
               - ^setup.cfg$
@@ -118,10 +119,6 @@
         - cross-swift-py38
         - openstack-tox-py36
         - openstacksdk-functional-devstack
-        - tempest-full-py3:
-            irrelevant-files:
-              - ^(test-|)requirements.txt$
-              - ^setup.cfg$
     experimental:
       jobs:
         - tempest-pg-full:

global-requirements.txt

@@ -182,7 +182,7 @@ os-vif!=1.8.0,!=1.12.0  # Apache-2.0
 ovs  # Apache-2.0
 os-win  # Apache-2.0
 os-xenapi  # Apache-2.0
-paramiko  # LGPLv2.1+
+paramiko!=2.9.0,!=2.9.1  # LGPLv2.1+
 passlib  # BSD
 Paste  # MIT
 PasteDeploy  # MIT

upper-constraints.txt

@@ -172,7 +172,7 @@ PyJWT===2.3.0
 typing_extensions===4.0.1
 XStatic-lodash===4.16.4.2
 zVMCloudConnector===1.4.1
-paramiko===2.9.1
+paramiko===2.8.1
 ifaddr===0.1.7
 reno===3.5.0
 imagesize===1.3.0