RFR: 8316996: Catalog API Enhancement: add a factory method [v2]

[Joe Wang]

> Add a new factory method so that a CatalogResolver can be created with a resolve property on top of the Catalog object.

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

  addressing review comments, plus use URL for relative URI

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Changes:
  - all: https://git.openjdk.org/jdk/pull/16045/files
  - new: https://git.openjdk.org/jdk/pull/16045/files/0248b82e..4f39bb96

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16045&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16045&range=00-01

  Stats: 16 lines in 2 files changed: 4 ins; 6 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/16045.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16045/head:pull/16045

PR: https://git.openjdk.org/jdk/pull/16045