Fix issues with MojDBPerfIndexTest

 - Use correct location for header files when built with levelDB
 - Don't run Index test when built with BerkeleyDB, until fixed

Open-webOS-DCO-1.0-Signed-off-by: Roger Stringer <roger.stringer@lge.com>

Change-Id: Ib9e534ea67b34b24327b6a16dfe7758b1a85108c