Add testcases to verify quotas and svc instances

   1.Testcase to verify project quotas used and limit details present in UI

   2.Testcase to verify svc instance details on service instances page

   3.Add code to verify main page details for control nodes, vrouters, config nodes and analytics nodes

   4.Add new files monitor_tab_tests and config_tab_tests
   remove tests_with_setup_base_webui -> had all testcases
   monitor_tab_tests-> Has testcases belonging to monitor tab
   monitor_tab_tests-> Has testcases belonging to config tab

   5.Refactor some code

   6.Update testcase name and description
     i.e. WebuiTestSanity.test_networks_in_webui_config_networking_networks -> config_tab_tests.ConfigTab.test_networks

Change-Id: Ib3aab705ecf333f01b98764d2d5b36f7e29ab16a
Merge "Add testcases to verify quotas and svc instances"