1. Added an attribute 'data-click-counter' in query execute button which gets incremented
once query button is clicked up to 9 and then reset to 0. This is added just to support automation.
2. Locator for login_group_role is added and used to expand tree.
3. Functions for enabling and disable auto_commit and auto_rollback are made more precise.
4. Some scrolling problem is addressed in view_data_dml_query test.
5. Handled the stale element reference exception in query_tool_journey_test
Changes included:
1. Created function for traversing the browser tree.
2. Fixed some synchronization issues.
3. Modified locators.
4. Test cases fix for the recent commits.
