[webapi] Integrate 115 tests for HTML5 Forms

 - designed: 4, approved: 111

Impacted tests(approved): new 111, update 0, delete 0
Unit test platform: [Tizen IVI][Android]
Unit test result summary: pass 111, fail 0, block 0
Let's polish these test files, especially for the assertions.

- Here better use `assert_false`
- Remove `<html> <head> <body>`
- Remove `type="text/javascript"` from `<script>`
- Remove end tag ` /` from `<link> <input> etc.`
- Indent JS code in 2 spaces rather than 4.

By the way, you can add commits rather than amend commits to track your improvement, thanks.