tests: when libvirtd changes state we delay polling for resources for 10 seconds
tests: when libvirtd changes state we delay polling for resources for 10 seconds

Let's make the testLibvirt wait as well to avoid unexpected state.

Fixes #12978

garrett/cockpit,moraleslazaro/cockpit,deryni/cockpit,cockpit-project/cockpit,cockpituous/cockpit,cockpit-project/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,deryni/cockpit,cockpit-project/cockpit,cockpituous/cockpit,mvollmer/cockpit,deryni/cockpit,cockpituous/cockpit,cockpituous/cockpit,martinpitt/cockpit,deryni/cockpit,moraleslazaro/cockpit,deryni/cockpit,deryni/cockpit,garrett/cockpit,cockpit-project/cockpit,mvollmer/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,garrett/cockpit,mvollmer/cockpit,martinpitt/cockpit,mvollmer/cockpit,deryni/cockpit,garrett/cockpit,mvollmer/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,garrett/cockpit