RFR: 8256515: javax.xml.XMLEventReader produces incorrect START_DOCUMENT event

[Marius Volkhart]

The default implementation of javax.xml.stream.XMLEventReader produced a StartDocument event that always indicated that the "standalone" attribute was set.

The root cause of this was that the com.sun.xml.internal.stream.events.XMLEventAllocatorImpl always set the "standalone" attribute, rather than asking streamReader.standaloneSet() before setting the property of the StartDocumentEvent being created.

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Commit messages:
 - Merge pull request #1 from jerboaa/pull-1056-amend
 - Adjust test so it works with jtreg
 - Fix: javax.xml.stream.XMLEventReader produces incorrect START_DOCUMENT event
 - Add test for XmlInputFactory

Changes: https://git.openjdk.java.net/jdk/pull/1056/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1056&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8256515
  Stats: 47 lines in 2 files changed: 46 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1056.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1056/head:pull/1056

PR: https://git.openjdk.java.net/jdk/pull/1056