RFR (XS): 8147079: Add serviceability/logging folder to hotspot_serviceability test group

[Marcus Larsson]

Hi,

Please review the following patch to add the serviceability/logging 
folder to the hotspot_serviceability test group. This will include the 
UL tests for JPRT runs.

Webrev:
http://cr.openjdk.java.net/~mlarsson/8147079/webrev.00/

Issue:
https://bugs.openjdk.java.net/browse/JDK-8147079

Testing:
JPRT

Thanks,
Marcus