Fix at least one problem found by the loader-cleanup-test.  Make the valgrind version of loader-cleanup-test use {{{-r 1000}}} so it runs faster.  Refs #2642. [t:2642]

git-svn-id: file:///svn/toku/tokudb@20482 c7de825b-a66e-492c-adef-691d508d4ae1