Fix Bug 1791 Openstack VIM connector failed Unittests

This patch fixes bug 1791 the Openstack VIM connector failed Unittests.
Openstack VIM unittests and coverage are also enabled in tox.ini.

Change-Id: I136a53a6f59c48a1681cfe3c87dbe9aada253a98
Signed-off-by: aticig <gulsum.atici@canonical.com>
diff --git a/requirements-test.txt b/requirements-test.txt
index f461166..9aafc4b 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -16,13 +16,13 @@
 #######################################################################################
 -e RO-plugin
     # via -r requirements-test.in
-coverage==6.2
+coverage==6.3.2
     # via
     #   -r requirements-test.in
     #   nose2
 mock==4.0.3
     # via -r requirements-test.in
-nose2==0.10.0
+nose2==0.11.0
     # via -r requirements-test.in
 six==1.16.0
     # via nose2