Ignore Nashorn's class loader for performance reasons

[dboreham]

See this discussion thread for background: #6985

[trask]

thx @dboreham!

@laurit had an additional comment that would be nice to include if you are able #6985 (reply in thread):

If we are going to exclude it we should also exclude the same class loader from older jdks that bundle nashorn, it should have a different package name there.

[dboreham]

thx @dboreham!

@laurit had an additional comment that would be nice to include if you are able #6985 (reply in thread):

If we are going to exclude it we should also exclude the same class loader from older jdks that bundle nashorn, it should have a different package name there.

Oh, I spaced that out. I will grab the stack trace from an older JDK to find the class name.

[dboreham]

thx @dboreham!
@laurit had an additional comment that would be nice to include if you are able #6985 (reply in thread):

If we are going to exclude it we should also exclude the same class loader from older jdks that bundle nashorn, it should have a different package name there.

Oh, I spaced that out. I will grab the stack trace from an older JDK to find the class name.

It turns out the fix is not required for JDK8: #6985 (comment)