|webapi| Add 18 TCs for DLNA

 Impacted TCs num: New 18, Update 5, Delete 0
 Unit test Platform: Tizen
 Tizen test result summary: Pass 19, Fail 4, Block 0
 Android test result summary: Pass 19, Fail 4, Block 0

Fail reason:
  1. The canCreateContainer and canUpload attribute type expected "boolean" but got "string"
  2. The  modelDescription and presentationURL attribute type expected "string" but got "object"
Merge pull request #99 from wanghongjuan/wanghongjuan/webapi/DLNA-add

[webapi] Add 18 TCs for DLNA MediaServer interface