CLOUDSTACK-4637: Add 30sec sleep before router is ssh'd

Egress rules testcases access vm via router. Sleep before
accessing router else the expect fails since router is not
accessible. Also use router.hostid instead of vm.hostid
to identify the host.

Signed-off-by: venkataswamybabu budumuru <venkataswamybabu.budumuru@citrix.com>
Added missing test for VPC load balancing rule from old QA repo to cloudstack repo

def test_04_VPC_CreateLBRuleInMultipleNetworksVRStoppedState

Since VPC now only allows load balancing on a single tier the test case
has been updated to check that condition

Ref : http://cloudstack.apache.org/docs/en-US/Apache_CloudStack/4.0.2/html/Installation_Guide/configure-vpc.html

Signed-off-by: venkataswamybabu budumuru <venkataswamybabu.budumuru@citrix.com>
(cherry picked from commit 5b5a617544fb8160b9429a24f1aa943e04d4f98a)