firewall: Wait for all zones to be present in custom services test (#12842)
firewall: Wait for all zones to be present in custom services test (#12842)

The dialog to add services behaves differently depending on the amount
of active zones (1 or >1). So wait until all zones are active.
deryni/cockpit,cockpituous/cockpit,cockpit-project/cockpit,martinpitt/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,deryni/cockpit,cockpituous/cockpit,deryni/cockpit,mvollmer/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,martinpitt/cockpit,deryni/cockpit,martinpitt/cockpit,garrett/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,deryni/cockpit,martinpitt/cockpit,cockpit-project/cockpit,garrett/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,mvollmer/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,garrett/cockpit,mvollmer/cockpit,mvollmer/cockpit,mvollmer/cockpit,cockpituous/cockpit,garrett/cockpit,deryni/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,cockpituous/cockpit,garrett/cockpit,deryni/cockpit