CLOUDSTACK-3168: Fix test_reboot_router.py to ssh using public IP
CLOUDSTACK-3168: Fix test_reboot_router.py to ssh using public IP

test_reboot_router.py was trying to ssh to vm using private IP
and hence it failed with error "No route to host."
Fixed the testcase to ssh using public IP.

Signed-off-by: Prasanna Santhanam <82219615980488abd2acc1a3d71cfb58f0b2b8b6@apache.org>

DaanHoogland/cloudstack,jcshen007/cloudstack,resmo/cloudstack,GabrielBrascher/cloudstack,resmo/cloudstack,GabrielBrascher/cloudstack,jcshen007/cloudstack,DaanHoogland/cloudstack,GabrielBrascher/cloudstack,DaanHoogland/cloudstack,resmo/cloudstack,GabrielBrascher/cloudstack,jcshen007/cloudstack,resmo/cloudstack,jcshen007/cloudstack,resmo/cloudstack,resmo/cloudstack,GabrielBrascher/cloudstack,wido/cloudstack,DaanHoogland/cloudstack,jcshen007/cloudstack,DaanHoogland/cloudstack,jcshen007/cloudstack,wido/cloudstack,GabrielBrascher/cloudstack,wido/cloudstack,DaanHoogland/cloudstack,wido/cloudstack,GabrielBrascher/cloudstack,wido/cloudstack,wido/cloudstack,wido/cloudstack,resmo/cloudstack,jcshen007/cloudstack,DaanHoogland/cloudstack