Increase the retries for rook operator pod

Sometimes it takes little longer than usual for rook operator to
become available so this change increases the retry from 10 to 20.

provisioner-type: bifrost
installer-type: kubespray
deploy-scenario: k8-calico-nofeature
Change-Id: I34b445ddc089226e1c7386dfae926a7f1e5beb4e
1 file changed