adds config.py file for xml

Change-Id: I94793cca2be79c1496b22f2457a52c801ae8755a
adds __init__.py to manila/share/drivers/utils/

Change-Id: I25b287d55e517f10239a12b797ea7a43526585bd
changed way of creating and changing xml

Change-Id: I1b27339d5d67b86e84630294f4cb4b9d03f817ea