Update in flush logic for method call/reponse pattern & minor fixes

1) Multiple WITH- or WITH_CHANGING- registrations with only one RETURNS-
, EXPORTS- , RAISES- , RAISES_BY_NAME- or CHANGES-registration are now
possible. Unit Tests ZTEST_CL_MOCKA_MOCKER -> GET_DELAY_MULTI_IMPORTING
/ IS_IN_TIME_BY_CHNG_PARAM_MULTI document the new functionality
2) minor fixes and renaming of unit test methods in report
ZTEST_CL_MOCKA_MOCKER
3) all Code inspector checks (variant DEFAULT with dynamic checks) are
passed
Refactoring of the mock object's class generation logic