Modified SFF OVS Model and Python scripts

- Changed SFF and SFF OVS models after studying dcloud setup
  Now, each sff data plane locator is augment to have bridge name
  and other OVS data. Same for sff-sf data plane locators
- Modified SFF bootstrap config to account for change
- Created Python script to setup all dcloud config in ODL in a single sweep.
- Modified gitignore to ignore pyc files

Signed-off-by: Reinaldo Penno <rapenno@gmail.com>