[C++] Bump TTL to 60s for Routing/Discovery proxies in libjoynr.
[C++] Bump TTL to 60s for Routing/Discovery proxies in libjoynr.

Change-Id: I87b3aa052d6ffe26d9acb5b4848f0bf42d9a5a93

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