[wrt][XWALK-2029]Update DB name

Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 4, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 4 , Fail 0, Blocked 0

wrt-manifest-tizen-tests: PASS 390,Fail 0
Merge pull request #688 from linshen/shenlin/wrt/sqlite3

[wrt][XWALK-2029]Update DB name