RFR(S): JDK-8035952 Remove use of JVM_Open, JVM_Read and JVM_Close functions from serviceability code

[frederic parain]

Greetings,

Please review this small changeset for CR JDK-8035952
"Remove use of JVM_Open, JVM_Read and JVM_Close functions from 
serviceability code"

Bug:
https://bugs.openjdk.java.net/browse/JDK-8035952

Webrev:
http://cr.openjdk.java.net/~fparain/8035952/webrev.00/

Tested with jdk_management test suite + manual tests
to verify consistency of values returned by new code.

Thank you,

Fred

-- 
Frederic Parain - Oracle
Grenoble Engineering Center - France
Phone: +33 4 76 18 81 17
Email: Frederic.Parain at oracle.com