Related-Bug: #1476413 test infra bug fixes
Related-Bug: #1476413 test infra bug fixes

- fixed issue with JointJS graph on Chrome borwser.

Change-Id: Ic13ca01b36769c95d3a4b95bc63565d4ff5c9617

nagakiran/contrail-web-core,vishnuvv/contrail-web-core,vishnuvv/contrail-web-core,biswajit-mandal/contrail-web-core,biswajit-mandal/contrail-web-core,nagakiran/contrail-web-core,nagakiran/contrail-web-core,vishnuvv/contrail-web-core,biswajit-mandal/contrail-web-core