unit-tests: load all libstrongswan plugins in test-runner

src/libstrongswan/tests/test_runner.c

@@ -32,6 +32,12 @@ int main()
 
 	library_init(NULL);
 
+	if (!lib->plugins->load(lib->plugins, NULL, PLUGINS))
+	{
+		library_deinit();
+		return EXIT_FAILURE;
+	}
+
 	sr = srunner_create(NULL);
 	srunner_add_suite(sr, bio_reader_suite_create());
 	srunner_add_suite(sr, bio_writer_suite_create());