Add simple memory leak check to all tests.

Wrap all tests with a memory balance check to detect potential
memory leaks.
Fixed a few tests that had memory leaks contained in the tests
themselves.

Signed-off-by: U. Artie Eoff <ullysses.a.eoff@intel.com>

tests/map-test.c

@@ -90,4 +90,6 @@ TEST(map_remove)
 	l = wl_map_insert_new(&map, WL_MAP_SERVER_SIDE, &d);
 	assert(l == WL_SERVER_ID_START + 1);
 	assert(wl_map_lookup(&map, l) == &d);
+
+	wl_map_release(&map);
 }