[wrt]fix wgt launch error,update wrt-commoni18n-webapp-tests config.xml

[Detailed commit message ]
Impacted TCs num(approved): New 0, update 3, deleted  0
Unit test platform: [tizen]
Crosswalk-8.36.170.0-0.i686.rpm 
Unit test result summary: Pass 3 , Fail  0, Blocked 0

Crosswalk-8.36.171.0-0.i686.rpm  the webapp can not show index.html, test fail
Unit test result summary: Pass 0 , Fail  3, Blocked 0