[C++] Removed reference to time_point in Timer::runTimer()
[C++] Removed reference to time_point in Timer::runTimer()

AddressSanitizer reported heap-use-after-free for the time point.

Change-Id: I33f753637efd0b245d5608887cb19bc715804662

bmwcarit/joynr,bmwcarit/joynr,clive-jevons/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,clive-jevons/joynr,clive-jevons/joynr,clive-jevons/joynr,bmwcarit/joynr,clive-jevons/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,clive-jevons/joynr