VR smoketests failures around VR reboot and shutdown+start

[yadvr]

Following smoketests are consistently failing against vmware and latest master:

Test	Result	Time (s)	Test File
test_reboot_router	Error	349.14	test_network.py
test_08_start_router	Error	71.81	test_routers.py
test_09_reboot_router	Error	0.12	test_routers.py
test_02_list_snapshots_with_removed_data_store	Error	1.18	test_snapshots.py
test_01_volume_usage	Error	9.42	test_usage.py

ISSUE TYPE

• Bug Report

[yadvr]

Smoketests health check PR #3517