Fix bug 1809 - Disabling RO OpenNebula plugin

Change-Id: I52a7947450d83b91fac92170348f7d474a878d97
Signed-off-by: sousaedu <eduardo.sousa@canonical.com>
diff --git a/requirements-test.txt b/requirements-test.txt
index cdf4a6a..f461166 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -16,7 +16,7 @@
 #######################################################################################
 -e RO-plugin
     # via -r requirements-test.in
-coverage==6.0
+coverage==6.2
     # via
     #   -r requirements-test.in
     #   nose2