Patch for JDK-8273541

[Kartik Ohri]

Hi all!
I would like to work on a fix for JDK-8273541
<https://bugs.openjdk.java.net/browse/JDK-8273541>. I think the regression
was introduced by the change here
<https://github.com/openjdk/jdk/pull/2380/files#diff-d62f4055445b40f5d9862e02f8be6da2d547ac77ffae362d7034595d58c7389aL220-R217>.
It seems that this was accidentally changed from Thread.MAX_PRIORITY to
Thread.MIN_PRIORITY.  As Thread.MIN_PRIORITY - 2 is negative and because of
the check here
<https://github.com/openjdk/jdk/pull/2380/files#diff-9f140a5980d51de2a5f392a6ffb91f51d2303760b699d5366125fb66f55b70f0R120-R122>,
the thread priority is not set. Changing this back to
Thread.MAX_PRIORITY should fix the problem. I tried the patch
<https://github.com/amCap1712/jdk/commit/b894bda67f9f4f8f48ba97679247a8218f6b95dc>
locally and it seems to fix the issue for me. If it is fine, I would like
to submit this fix.
Regards,
Kartik