Closes #31 - UT for ZCL_YUML_CLASS (events, event parameters)

Local test classes created inside ZCL_YUML_CLASS
- zcl_yuml_class_events_test
- zcl_yuml_class_many_eve_test
- zcl_yuml_class_many_evep_test
Merge branch '#31-UT-for-ZCL_YUML_CLASS-(events,-event-parameters)'