1) Replace the deprecated unit test method.
2) Wraps filter usage in a list call.
3) Converts the old metaclass syntax to new.
4) Use range instead of xrange method.
5) Change Unicode to str.
6) Several other transformations.
7) Fixed change password test cases.
8) Use simplejson instead of plain JSON.
1. Code changes (due to drop objects functionality).
2. Quoting for database names in drop databases.
3. Code changes for import errors for pickle_path and advanced_config variables.
1. The user will specify the tablespace path in test_config.json.in
2. If tablespace path not found, skip the test cases for that server(Only tablespace test cases)
3. Add the skipped test summary in the test result. (Now it's showing on console + in log file, but need to update in a final enhanced test summary report. Which is research point we will work on that after finishing all nodes API test cases)
4. Removed the test_ prefix from the values in the config files.
5. Add tablespace and roles tests
