Refactor module test_streaming_files_simple_multiple_mountpoints.py, remove unused variables
Modify module test_streaming_files_simple_multiple_mountpoints.py, fix line break in output
Bugfix function create_test_dir of module test_streaming_files_simple_multiple_mountpoints.py, to be compatible with the second version of sugarsync, which does not allow to create directories in the root directory from the API