Addresses #553

Fixes memory leak (just in test) of locktree managers.

git-svn-id: file:///svn/tokudb@2950 c7de825b-a66e-492c-adef-691d508d4ae1

src/lock_tree/tests/test_00000_createclose.c

@@ -21,5 +21,9 @@ int main() {
         lt = NULL;
     }
 
+    r = toku_ltm_close(mgr);
+    CKERR(r);
+    mgr = NULL;
+
     return 0;
 }