[14] Review request for 8068184: Fix for JDK-8032832 caused a deadlock

[Anton Litvinov]

Hello,

Could you please review the following fix for the bug. The bug consists 
in a deadlock introduced by the fix for the bug JDK-8032832, which 
introduced locking on the thread context class loader in the method 
"sun.net.www.protocol.http.NegotiateAuthentication.isSupported(HttpCallerInfo)". 
The fix just fully reverts changes introduced by the fix for JDK-8032832.

Verified using the attached to the bug record test case that the fix 
eliminates the deadlock. Verified that "jdk/jdk" with this fix is 
compiled on all supported OS families: MS Windows, macOS, Linux, Solaris.

Bug: https://bugs.openjdk.java.net/browse/JDK-8068184
Webrev: http://cr.openjdk.java.net/~alitvinov/8068184/jdk14/webrev.00

Thank you,
Anton