Feature/life safety zone object example (#595)

* Added Keylist_Data_Free function to free all nodes and data in a list

* Added basic Life Safety Zone object type in the apps/server example, with unit testing.

test/bacnet/basic/object/lsz/src/main.c

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2020 Legrand North America, LLC.
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+/* @file
+ * @brief test BACnet integer encode/decode APIs
+ */
+
+#include <zephyr/ztest.h>
+#include <bacnet/bactext.h>
+#include <bacnet/basic/object/lsz.h>
+#include <property_test.h>
+
+/**
+ * @addtogroup bacnet_tests
+ * @{
+ */
+
+/**
+ * @brief Test
+ */
+#if defined(CONFIG_ZTEST_NEW_API)
+ZTEST(testsLifeSafetyZone, testLifeSafetyZone)
+#else
+static void testLifeSafetyZone(void)
+#endif
+{
+    bool status = false;
+    unsigned count = 0;
+    uint32_t object_instance = 0, test_object_instance = 0;
+    const int skip_fail_property_list[] = { -1 };
+
+    Life_Safety_Zone_Init();
+    object_instance = Life_Safety_Zone_Create(BACNET_MAX_INSTANCE);
+    count = Life_Safety_Zone_Count();
+    zassert_true(count > 0, NULL);
+    test_object_instance = Life_Safety_Zone_Index_To_Instance(0);
+    zassert_equal(test_object_instance, object_instance, NULL);
+    bacnet_object_properties_read_write_test(
+        OBJECT_LIFE_SAFETY_ZONE,
+        object_instance,
+        Life_Safety_Zone_Property_Lists,
+        Life_Safety_Zone_Read_Property,
+        Life_Safety_Zone_Write_Property,
+        skip_fail_property_list);
+}
+/**
+ * @}
+ */
+
+#if defined(CONFIG_ZTEST_NEW_API)
+ZTEST_SUITE(testsLifeSafetyZone, NULL, NULL, NULL, NULL, NULL);
+#else
+void test_main(void)
+{
+    ztest_test_suite(testsLifeSafetyZone,
+     ztest_unit_test(testLifeSafetyZone)
+     );
+
+    ztest_run_test_suite(testsLifeSafetyZone);
+}
+#endif