Use a suitable error condition for the execute() functions

src/MessageParser.cpp

src/Services/EventActionService.cpp

src/Services/EventReportService.cpp

src/Services/FunctionManagementService.cpp

src/Services/MemoryManagementService.cpp

src/Services/ParameterService.cpp

src/Services/TestService.cpp

src/Services/TimeBasedSchedulingService.cpp

src/Services/TimeManagementService.cpp