[webapi] Change 2 manual case to automation

Impacted TCs num: New 0, Update 2, Delete 0
Unit test Platform: [Android]
Unit test result summary: Pass 2, Fail 0, Blocked 0
Merge pull request #1215 from JianfengXu/csp/ref

[webapi] Change 2 manual case to automation
[Stability] Improve one manual test to auto for wrt-stablonglastmanu-android-tests

Impacted TCs num(approved): New 0, Update 1, Delete 0
Unit test Platform: Android
Android test result summary: Pass 1, Fail 0, Block 0]
Merge pull request #1217 from wanghongjuan/stability/stablongmaun

[Stability] Improve one manual test to auto for stablonglastmanu
[webapi] Remove some tests of HTML iframe

- remove: 12, update: 2

Impacted tests(approved): new 0, update 2, delete 12
Unit test platform: [IVI] crosswalk-10.38.222, t-e-c 0.107
Unit test result summary: pass 2, fail 0, block 0
Merge pull request #1223 from xinliux/sandbox-remove

[webapi] Remove some tests of HTML iframe