tbf/test: Optionally show talloc report

To show the talloc report more easily, this commit adds a call to
talloc_report_full if the TALLOC_REPORT_FULL environment variable is
set (the value is ignored). Since the stderr output is checked by the
test suite, this feature is not enabled by default.

Sponsored-by: On-Waves ehf

tests/tbf/TbfTest.cpp

@@ -378,6 +378,9 @@ int main(int argc, char **argv)
 	test_tbf_final_ack(TEST_MODE_REVERSE_FREE);
 	test_tbf_delayed_release();
 	test_tbf_exhaustion();
+
+	if (getenv("TALLOC_REPORT_FULL"))
+		talloc_report_full(tall_pcu_ctx, stderr);
 	return EXIT_SUCCESS;
 }