ITM Tep Auto Config Unit test using Guice.

ITM Tep Auto Config Unit test using Guice.

Added cases for:
- Change for def-tz-enabled and def-tz-tunnel-type config paramters
- Default-TZ creation and deletion based on def-tz-enabled flag
- TEP addition and deletion into/from default-TZ
- TZ creation and TEP addition into TZ
- TZ deletion and TEP deletion from TZ
- TEP addition and deletion into/from default-TZ via southbound
- TEP addition and deletion into/from northbound configured TZ via southbound
- TEP addition and deletion into/from NotHostedList via southbound
- Move TEP from one TZ to other TZ by changing tzname parameter in
  ExternalsIds list in Ovsdb node from southbound
- Update TEP for its bridge by changing dpn-br-name parameter in
  ExternalsIds list in Ovsdb node from southbound

Fixed errors due to new change of (1) dpn-br-name to br-name and
(2) 'weight' param inside vteps in itm.yang

Fixed checkstyle issues.

Change-Id: Iea4279a992bf80a95d04e39f08cc59188327c9b5
Signed-off-by: Tarun Thakur <tarun.t@altencalsoftlabs.com>