[wrt]Add setting:context-menu to usecase

[Detailed commit message (if have)]
Impacted TCs num(approved):New 1,Update 0,Delete 0
UT result: Do UT after image is ok
[webapi][xwalk-3001] Remove test suite of HTML Templates

- There is no feature requirement in this JIRA system for the HTML Templates, so only check this feature by usecase https://github.com/crosswalk-project/demo-express/tree/master/samples/HTMLTemplate
Merge pull request #1258 from haoxli/webapi/xwalk-3001

[webapi][xwalk-3001] Remove test suite of HTML Templates
[webapi][xwalk-1326] Remove test suite of CSS Style Attribute

- The feature for CSS Style Attribute (http://www.w3.org/TR/2013/REC-css-style-attr-20131107/) has been dropped, so remove this test suite.
[webapi][xwalk-3001] Remove HTML Templates test suite from pack script

- The test suite of HTML Templates have been removed in PR#1258
Merge pull request #1260 from haoxli/webapi/xwalk-1326

[webapi][xwalk-1326] Remove test suite of CSS Style Attribute
Merge pull request #1259 from haoxli/webapi/xwalk-3001-2

[webapi][xwalk-3001] Remove HTML Templates test suite from pack script
Merge pull request #1233 from linshen/shenlin/update-xwalk1491

[wrt]Add setting:context-menu to usecase