jdk11u and -oracle versions

[Aleksey Shipilev]

Look at this issue:
  https://bugs.openjdk.java.net/browse/JDK-8204142

It has jdk11u-fix-request and jdk11u-fix-yes labels. And it has backport that mentions
11.0.3-oracle. And there are *no* relevant changesets in jdk-updates/jdk11u:
  http://hg.openjdk.java.net/jdk-updates/jdk11u/log?rev=8204142

I have a few questions at this point:
 a) What is 11.0.3-oracle, and why indeed it is in openjdk bug tracker?
 b) Where is the pushed changeset? Is it in some Oracle-private tree? I assumed jdk*u-fix* tags are
for openjdk repositories, so issues have to be pushed to openjdk repositories, not some Oracle
internal repo?

Thanks,
-Aleksey