RFR: Filter out serviceability tests that not applicable to Shenandoah

[Zhengyu Gu]

This clears hotspot_serviceability tests for Shenandoah

Webrev: 
http://cr.openjdk.java.net/~zgu/shenandoah/filter_serviceability/webrev.00/index.html


Test:
   hotspot_serviceability (fastdebug and release)

Thanks,

-Zhengyu