TESTS: WRITE16 is optional so update the tests to allow WRITE16 to be missing and just make the test be [SKIPPED]

test-tool/test_write16_beyond_eol.c

@@ -41,6 +41,11 @@ test_write16_beyond_eol(void)
 					   i * block_size, block_size,
 					   0, 0, 0, 0, 0, buf);
 		free(buf);
+		if (ret == -2) {
+			logging(LOG_NORMAL, "[SKIPPED] WRITE16 is not implemented.");
+			CU_PASS("WRITE16 is not implemented.");
+			return;
+		}	
 		CU_ASSERT_EQUAL(ret, 0);
 	}