[doc][cordova] Update Cordova User and Developer Guide

- Update Cordova_Test_Suite_User_Guide.md to lastest cordova
- Add Cordova_Test_Suite_Developer_Guide.md
Merge pull request #971 from haoxli/haoxli/doc/cordova-develop-guide

[doc][cordova] Update Cordova User and Developer Guide
[wrt]update test suite.json add test app

Impacted TCs num(approved): New 0, update 3 suite name
Unit test platform: [tizen]
UT result: Pass 3, Fail 0
Merge pull request #978 from linshen/shenlin/updatedigital-tizen

[wrt]update test suite.json add test app