[C++] Fixed type in exception text of JoynrRuntime
[C++] Fixed type in exception text of JoynrRuntime

Change-Id: I28a9453bcc6a3e47339ba2e78dc55ce634f56edb

bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr