JDK RFR of 8147545: Remove sun.misc.ManagedLocalsThread from java.prefs

[Brian Burkhalter]

Please review at your convenience.

Issue:	https://bugs.openjdk.java.net/browse/JDK-8147545
Patch:	http://cr.openjdk.java.net/~bpb/8147545/webrev.00/

Replaced using of ManagedLocalsThread with a Thread created from the new constructor

Thread(ThreadGroup,Runnable,String,long,boolean)

with the boolean parameter “inheritThreadLocals” set to false.

Thanks,

Brian