RFR: 8154059: JVMTI ObjectTagging to UL

[Robbin Ehn]

Hi all,

Please review:

This moves jvmti object-tagging output to the tag-set 
jvmti,objecttagging on debug level.

The TraceJVMTIObjectTagging argument is deprecated and aliased with:
"-Xlog:jvmti+objecttagging=debug"

Did this on top of:
http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2016-April/019007.html
but only part common is the jvmti tag (logTag.hpp).

Webrev: http://cr.openjdk.java.net/~rehn/8154059/
Bug: https://bugs.openjdk.java.net/browse/JDK-8154059

Thanks!

/Robbin