merging mainline changes : 532124fea80614e6841a504347a3fc2751beadd8
We are downlowding the request version 2.Hence requests.post with prefetch argument failing.Changed the condition to check for requests version gt or equal to 1
Import sdn_policy_topo_with_multi_project, policy_test_helper correctly
Merge remote-tracking branch 'upstream/master'
Merge pull request #139 from sandip-d/master

merging mainline changes : 532124fea80614e6841a504347a3fc2751beadd8
Merge pull request #141 from vedujoshi/master

Import sdn_policy_topo_with_multi_project, policy_test_helper correctly
Test code for Headless Vrouter Testing and Compute Node fixture.
Review comments from Vedu incorporated.
Removing commented code.
Removing unnecessary imports.
Test code for Headless Vrouter Testing and Compute Node fixture.
Review comments from Vedu incorporated.
Removing commented code.
Removing unnecessary imports.
Removing:
1. unwanted vm ping test(negative).
2. unwanted updation of vm_node_ip field.
Merge branch 'master' of github.com:ritamganguly/contrail-test-1

Conflicts:
	fixtures/compute_node_test.py
	serial_scripts/headless_vrouter/test_headless_vrouter.py