CIDR infra support.
Test policy inheritance.
Removed the template string and moved things on to the template file in the test repo, <repo>/sanity_params.ini.sample
added stack_domain variable to template for identity v3.0 and email-to can now be a comma separated list of mailIds
loading pyvirtualdisplay and selenium is optional and needed for webui based testing alone. Have added is_gui_based_testing() in ContrailTestInit
Few code cleanups in the infra
Merge remote-tracking branch 'upstream/master'

Conflicts:
	tools/report_gen.py
Fixing merge conflicts
Merge remote-tracking branch 'upstream/master'

Conflicts:
	tools/report_gen.py
	tools/send_mail.py
Asserting if vm in error state
Merge pull request #160 from sandip-d/master

Asserting if vm in error state
Revert "Asserting if vm in error state"
Merge pull request #163 from bhushana/revert-160-master

Revert "Asserting if vm in error state"
Merge pull request #157 from vedujoshi/master

Use cirros img file itself instead of tar.gz
Merge pull request #153 from ritamganguly/master

CIDR infra support.
Removing multi-tenancy test case from sanity
Skipping retry if vm is in error state
Skipping retry if vm in error state
Hard coding the concurrency to 4
1]. Made changes in getting ECMP route info and tap interface list.
Merge pull request #167 from ganeshahv/master

1]. Made changes in getting ECMP route info and tap interface list.
Merge pull request #166 from sandip-d/master

Skipping vm verification if vm in error state
missed the part for tunnel next-hop in my earlier commit
Adding back webui_config flag and changing the api accordingly in test_init