8340552: Harden TzdbZoneRulesCompiler against missing zone names

[dimitryc]

Almost clean backport after path reshuffling except copyright year (updated manually).

All relevant tests passed (java/text/Format java/util/TimeZone sun/util/calendar sun/util/resources).

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8340552 needs maintainer approval

Issue

• JDK-8340552: Harden TzdbZoneRulesCompiler against missing zone names (Bug - P5)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk8u.git pull/66/head:pull/66
$ git checkout pull/66

Update a local copy of the PR:
$ git checkout pull/66
$ git pull https://git.openjdk.org/jdk8u.git pull/66/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 66

View PR using the GUI difftool:
$ git pr show -t 66

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk8u/pull/66.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back dcherepanov! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

Webrevs

• 00: Full (0beb0da4)