[jdk8u-dev] RFR: Backport 4ebbfc918f558e73c05f471cfd3ab2b11dcf5a75 [v4]

[Alex Kasko]

> Please review a backport of a JAXP cleanup.
> 
> Original commit [17b47acf5b3d](https://hg.openjdk.java.net/jdk9/jdk9/jaxp/rev/17b47acf5b3d) in jdk9.
> 
> Commit [4ebbfc9](https://github.com/openjdk/jdk11u-dev/commit/4ebbfc918f558e73c05f471cfd3ab2b11dcf5a75) in jdk11u-dev.
> 
> This cleanup should allow to backport other JAXP changes (like [JDK-8163121](https://bugs.openjdk.java.net/browse/JDK-8163121)) easier.
> 
> All code changes apply cleanly (with reshuffled paths) except [LSSerializerTest.java](https://github.com/openjdk/jdk11u-dev/blob/4ebbfc918f558e73c05f471cfd3ab2b11dcf5a75/jaxp/test/javax/xml/jaxp/unittest/org/w3c/dom/ls/LSSerializerTest.java) that was excluded. LSSerializerTest.java is not present in 8u, it was added with JDK-8043084 (not public, jdk9 commit [29ba77ad2a87](https://hg.openjdk.java.net/jdk9/jdk9/jaxp/rev/29ba77ad2a87)).
> 
> Testing:
> 
>  - [x] jtreg:javax/xml/jaxp
>  - [x] jck:api/javax_xml

Alex Kasko has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  8129572: Cleanup usage of getResourceAsStream in jaxp
  
  Reviewed-by: alanb, joehw, mchung, redestad
  Backport-of: 4ebbfc918f558e73c05f471cfd3ab2b11dcf5a75

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk8u-dev/pull/4/files
  - new: https://git.openjdk.java.net/jdk8u-dev/pull/4/files/24601c81..0c0854a8

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk8u-dev&pr=4&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk8u-dev&pr=4&range=02-03

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk8u-dev/pull/4.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk8u-dev pull/4/head:pull/4

PR: https://git.openjdk.java.net/jdk8u-dev/pull/4