Fix tempest plugins sanity jobs by exclude failing plugins

Below plugins are failing with error:

File "/home/zuul/src/opendev.org/openstack/tempest/.venv/lib/python3.8/site-packages/psycopg2/__init__.py", line 51, in <module>
2021-09-08 01:14:10.471582 | ubuntu-focal |     from psycopg2._psycopg import (                     # noqa
2021-09-08 01:14:10.471614 | ubuntu-focal | ImportError: libpq.so.5: cannot open shared object file: No such file or directory

https://zuul.opendev.org/t/openstack/build/b61a48196dfa476d83645aea4853e544/log/job-output.txt#271722

Failed Plugins: x/networking-l2gw-tempest-plugin,
x/novajoin-tempest-plugin, x/ranger-tempest-plugin,
x/tap-as-a-service-tempest-plugin, x/trio2o,

Change-Id: I485b180353c071a4b72865c87ecfd5ddd0119a9d
diff --git a/tools/generate-tempest-plugins-list.py b/tools/generate-tempest-plugins-list.py
index eef5886..b96bbe4 100644
--- a/tools/generate-tempest-plugins-list.py
+++ b/tools/generate-tempest-plugins-list.py
@@ -64,7 +64,19 @@
     # https://review.opendev.org/c/x/mogan/+/767718
     'x/vmware-nsx-tempest-plugin'
     # Failing since 2021-08-27
-    # https://zuul.opendev.org/t/openstack/build/45f6c8d3c62d4387a70b7b471ec687c8
+    # https://zuul.opendev.org/t/openstack/build
+    # /45f6c8d3c62d4387a70b7b471ec687c8
+    # Below plugins failing for error in psycopg2 __init__
+    # ImportError: libpq.so.5: cannot open shared object
+    # file: No such file or directory
+    # https://zuul.opendev.org/t/openstack/build
+    # /b61a48196dfa476d83645aea4853e544/log/job-output.txt#271722
+    # Failing since 2021-09-08
+    'x/networking-l2gw-tempest-plugin'
+    'x/novajoin-tempest-plugin'
+    'x/ranger-tempest-plugin'
+    'x/tap-as-a-service-tempest-plugin'
+    'x/trio2o'
 ]
 
 url = 'https://review.opendev.org/projects/'