[misc] Add usecase for networkbearerselection

- Fail Reason: the requestRouteToHost method is implemented incroccet

Impacted tests(approved): New 1, Update 0, Delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: Pass 0, Fail 1, Block 0
Merge pull request #386 from minxhuang/tests/misc/webapi-usecase-tizen-tests

[misc] Add usecase for networkbearerselection