macvtap, tests: Increase macvtap iface IP address report timeout
macvtap, tests: Increase macvtap iface IP address report timeout

QEMU guest-agent (GA) learn and reports the network interfaces
stats of the guest.
We see it timeout's to report the macvtap interface IP address
for a while now, it may take a bit more time for the GA to
report it.
As initial step we should increase the time we wait for the IP
address to appear.

Signed-off-by: Or Mergi <df7b5d365066aa2e85ccd79e6b18e2863f1da762@redhat.com>

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