Merge pull request #6446 from copejon/ushift-5476-release-4.21

USHIFT-5476: [release-4.21] Fix bug: fix certificate rotation test time mismatch

Author: openshift-merge-bot[bot]

test/suites/standard2/validate-certificate-rotation.robot

@@ -69,7 +69,7 @@ Change System Date To
     Wait Until MicroShift Process ID Changes    ${ushift_pid}
     All Certificates Should Be Valid For Current Time
     Setup Kubeconfig
-    Wait For MicroShift
+    Restart Greenboot And Wait For Success
 
 Compute Date After Days
     [Documentation]    return system date after number of days elapsed from midnight tomorrow