[8u] RFA for backport of JDK-8177721: Improve diagnostics in sun.management.Agent#startAgent()

[Shafi Ahmad]

Hi,

May I get the approval of backport of "JDK-8177721: Improve diagnostics in sun.management.Agent#startAgent()" to jdk8u.

Webrev: http://cr.openjdk.java.net/~shshahma/8177721/jdk8u/webrev.00/
Jdk10 bug: https://bugs.openjdk.java.net/browse/JDK-8177721
Jdk10 review: http://mail.openjdk.java.net/pipermail/serviceability-dev/2017-April/021188.html
Jdk8 review thread: http://mail.openjdk.java.net/pipermail/serviceability-dev/2017-October/022125.html
Jdk10 changeset: http://hg.openjdk.java.net/jdk10/jdk10/jdk/rev/9c9b8a48cd4a

Testing: jprt -testset core

Regards,
Shafi