EXSWHTEC-224 - Test cases ID clean up and documentation for Device Management (#70)

- Test cases ID clean up and documentation for Device Management
- Adjust doxygen comments to fix bugs
- Adjust defgroup comments for test modules

catch/include/hip_test_defgroups.hh

@@ -32,7 +32,14 @@ THE SOFTWARE.
 /**
  * @defgroup GraphTest Graph Management
  * @{
- * This section describes the graph management types & functions of HIP runtime API.
+ * This section describes tests for the graph management types & functions of HIP runtime API.
+ * @}
+ */
+
+/**
+ * @defgroup DeviceTest Device Management
+ * @{
+ * This section describes tests for device management functions of HIP runtime API.
  * @}
  */