Remove error checks which causes false failures

:Release Notes:
Eliminate error checks on the return codes from the init() calls
to the new classes for shardIdCache and shardIdEngine.  These
caused failures in test_dbclient and test_db_stress.

:Detailed Notes:
These new classes are not yet fully integrated into DB8.

:Testing Performed:
build process

:QA Notes:

:Issues Addressed:
[GF-14550] DB8#77 and #78 are failing in test_db_stress and test_dbclient

Open-webOS-DCO-1.0-Signed-off-by: Igor Kuksyuk <ikuksyuk@luxoft.com>

Change-Id: Ia919344a2b7d89646e8c1844d5ca22a64481429e
Reviewed-on: https://g2g.palm.com/3127
Reviewed-by: Build Verification
Reviewed-by: Roger Stringer <roger.stringer@lge.com>
Tested-by: Roger Stringer <roger.stringer@lge.com>