[webapi] Integrate 12 tests for W3C SSE

- approved: 11, designed: 1
- Update support/sse.php to support/sse.cgi

Impacted tests(approved): new 11, update 0, delete 0
Unit test platform: [IVI] crosswalk-10.38.222, t-e-c 0.107
Unit test result summary: pass 11, fail 0, block 0