[jdk13u-dev] RFR: 8233686: XML transformer uses excessive amount of memory

[Yuri Nesterenko]

I'd like to port it here, too. Patch applies without any adjustment, tests tier1 and 2 pass

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Commit messages:
 - Backport cef999178cf5ad0b5481da2938169bdd2084d612

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/54/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=54&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8233686
  Stats: 26 lines in 2 files changed: 23 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/54.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/54/head:pull/54

PR: https://git.openjdk.java.net/jdk13u-dev/pull/54