Remove needless "MojErrCheck" macro

:Release Notes:
Remove needless "MojErrCheck" macro in MojDbLunaServiceDb::open

:Detailed Notes:
- Remove "MojErrCheck" macro in MojDbLunaServiceDb::open;
- If not remove, correct message should be ignored.

:Testing Performed:
tested on build

:QA Notes:

:Issues Addressed:
[GF-39359] "db not open error" is reported ...

Open-webOS-DCO-1.0-Signed-off-by: kyouhyun.hwang <kyouhyun.hwang@lge.com>

Change-Id: I00d52de8ccbdf3dc54a4cd6d617b50b73cb8648d
Reviewed-on: https://g2g.palm.com/3547
Reviewed-by: Kyouhyun Hwang <kyouhyun.hwang@lge.com>
Tested-by: Kyouhyun Hwang <kyouhyun.hwang@lge.com>
Reviewed-by: Roger Stringer <roger.stringer@lge.com>