Fix test: handler losing connectivity
Fix test: handler losing connectivity

Wait for all handlers to be ready.
Not ready handlers can affect cluster config updates in next step.

Signed-off-by: L. Pivarc <20641f57cb8ae0a0c0cb8324c56aa3e53fb301f0@redhat.com>

kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt