RFR 8068976: Remove JSDT implementation

[Jaroslav Bachorik]

Please, review the following removal of functionality.

Issue : https://bugs.openjdk.java.net/browse/JDK-8068976
Webrev: http://cr.openjdk.java.net/~jbachorik/8068976/webrev.00

JDK-8062303 [1] requests the removal of com.sun.tracing API. This API 
was added as experimental in JDK7 [2][3] and haven't seen any 
significant uptake since then.

JSDT builds on top of the com.sun.tracing API and provides the bridge to 
DTrace. It allows Java programs to fire custom DTrace probes. As an 
implementation of com.sun.tracing API it needs to be removed before 
proceeding with the removal of that API.

This change is basically an anti-delta to [4] - minus the changes not 
related to JSDT and/or DTrace.

This change passes all the regression and JCK tests.

Thanks,

-JB-


[1] https://bugs.openjdk.java.net/browse/JDK-8062303
[2] https://bugs.openjdk.java.net/browse/JDK-6537506
[3] https://bugs.openjdk.java.net/browse/JDK-7037081
[4] http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/018d5b58dd4f