RFR: 8305814: Update Xalan Java to 2.7.3 [v2]

[Joe Wang]

> Xalan 2.7.3: merge minor changes from the upstream project.
> 
> Test: existing XML tests pass

Joe Wang has updated the pull request incrementally with one additional commit since the last revision:

  remove commented out block in ExsltDatetime

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/16532/files
  - new: https://git.openjdk.org/jdk/pull/16532/files/06535c4a..0d13a5a5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16532&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16532&range=00-01

  Stats: 23 lines in 1 file changed: 0 ins; 23 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/16532.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16532/head:pull/16532

PR: https://git.openjdk.org/jdk/pull/16532