refs #5702 remove the old perf_insert_multiple, add the new perf_iibench. it is currently very simple. the first DB is a unique index with an autoincrement key, the rest of the DBs are non-unique and have random keys.


git-svn-id: file:///svn/toku/tokudb@50304 c7de825b-a66e-492c-adef-691d508d4ae1