tests: extend TestMachines.testAddDisk to add disks from iscsi pool
tests: extend TestMachines.testAddDisk to add disks from iscsi pool

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