[webapi] Integrate 1 test for FileSystem-tizen

Impacted tests(approved): new 1, update 0, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 1, fail 0, block 0
Merge pull request #1185 from yunxiaoxie/move-filesystem-tizen

[webapi] Integrate 1 test for FileSystem-tizen