Correct the import path of policy_test_utils

VNFixture was not using the complete path of the module.
So, changed the way import is done
Correct the import path of policy_test_utils

VNFixture was not using the complete path of the module.
So, changed the way import is done
Merge remote-tracking branch 'upstream/master'
Correct the syntax error in the import statement
Merge pull request #135 from vedujoshi/master

Correct the import path of policy_test_utils