[webapi] Add basic RawSockets TCs instead of IDL for existent checkpoint

Impacted test suite: webapi-rawsockets-sysapps-tests
Impacted TCs num: New 45, Update 0, Delete 0
Unit test platform: IVI
IVI test result summary: Pass 39, Fail 6, Block 0

Comment:
  The fail cases should be caused by the changement of spec, some attributes have been removed from spec of privious version. Our cases follow the old spec but the implement of interface follow the lastest spec.
Merge pull request #87 from jshentux/jshentux/webapi/rawsocket-idl

[webapi] Add basic RawSockets TCs instead of IDL for existent checkpoint