[webapi] Update config files for nativefilesystem

- Use webrunner folder instead of testkit folder

Impacted tests(approved): new 0, update 0, delete 0
Unit test platform: [Tizen IVI][Android]
Unit test result summary: pass 52, fail 0, block 0
Merge pull request #619 from yunxliu/yunxliu/webapi/nativefilesystem

[webapi] Update config files for nativefilesystem