RFR: 8334761: Source launcher fails with "Module reads more than one module named" error [v2]

[Christian Stein]

> Please review this change to fix the setup of the optional module layer for user-supplied modules.
> 
> This fix is composed of two parts:
> - modules already resolved in the boot layer are no longer part of the parent layer
> - the parent layer configuration does no longer bind services

Christian Stein has updated the pull request incrementally with one additional commit since the last revision:

  In source launch mode, add all modules on the module path by default.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19842/files
  - new: https://git.openjdk.org/jdk/pull/19842/files/a4776ef6..c5c437f7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19842&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19842&range=00-01

  Stats: 33 lines in 2 files changed: 1 ins; 27 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/19842.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19842/head:pull/19842

PR: https://git.openjdk.org/jdk/pull/19842