[C++] generic hash implementation for generated map datatypes
[C++] generic hash implementation for generated map datatypes

Change-Id: Ie4bbf44179b6d27ca5d977a73077e43617e44aa2

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