RFR: 8328313: Archived module graph should allow identical --module-path to be specified during dump time and run time [v7]

[Calvin Cheung]

> Prior to this patch, if `--module-path` is specified in the command line:
> during CDS dump time, full module graph will not be included in the CDS archive;
> during run time, full module graph will not be used.
> 
> With this patch, the full module graph will be included in the CDS archive with the `--module-path` option. During run time, if the same `--module-path` option is specified, the archived module graph will be used.
> 
> The checking of module paths between dump time and run time is more lenient compared with the checking of class paths; the ordering of the modules is unimportant, duplicate module names are ignored.
> E.g. the following is considered a match:
> dump time      runtime
> m1,m2             m2,m1
> m1,m2             m1,m2,m2
> 
> I included some [notes](https://bugs.openjdk.org/browse/JDK-8328313?focusedId=14699275&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14699275) in the bug report regarding some changes in the corelib classes.

Calvin Cheung has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains eight commits:

 - fix merge error
 - Merge branch 'master' into 8328313-FMG-module-path
 - @AlanBateman comments
 - @iklam comments
 - fix indentation
 - trailing whitespace
 - comments from David, Alan, and Ioi
 - 8328313: Archived module graph should allow identical --module-path to be specified during dump time and run time

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Changes: https://git.openjdk.org/jdk/pull/21048/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21048&range=06
  Stats: 525 lines in 19 files changed: 480 ins; 2 del; 43 mod
  Patch: https://git.openjdk.org/jdk/pull/21048.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21048/head:pull/21048

PR: https://git.openjdk.org/jdk/pull/21048