RFR: 8204256: improve jlink error message to report unsupported class file format [v3]

[Ian Graves]

> This pull request contains a change to facilitate better error messages in jlink for when jlink creates an image from
> jmod files that are unsupported by the runtime by being _too new_. The existing behavior supports modules that are too
> old via an error about a mismatched version.  The solution to this problem is constrained by jlink's use of some
> specified behavior by java.lang.module.ModuleFinder. The solution in this PR is to subclass some existing exceptions
> internally as to signal to jlink more specific error conditions when attempting to find and open modules.  Bug here:
> https://bugs.openjdk.java.net/browse/JDK-8204256
> New Error message example:
> 
>  reading module: /Users/igraves/dev/jdk-otro/build/macosx-x64/images/jmods/java.security.sasl.jmod
> java.lang.module.FindException: Error reading module:
> /Users/igraves/dev/jdk-otro/build/macosx-x64/images/jmods/java.security.sasl.jmod 	at
> java.base/jdk.internal.module.ModulePath.readModule(ModulePath.java:350) 	at
> java.base/jdk.internal.module.ModulePath.scanDirectory(ModulePath.java:284) 	at
> java.base/jdk.internal.module.ModulePath.scan(ModulePath.java:232) 	at
> java.base/jdk.internal.module.ModulePath.scanNextEntry(ModulePath.java:190) 	at
> java.base/jdk.internal.module.ModulePath.find(ModulePath.java:154) 	at
> jdk.jlink/jdk.tools.jlink.internal.JlinkTask.newModuleFinder(JlinkTask.java:443) 	at
> jdk.jlink/jdk.tools.jlink.internal.JlinkTask.initJlinkConfig(JlinkTask.java:374) 	at
> jdk.jlink/jdk.tools.jlink.internal.JlinkTask.run(JlinkTask.java:267) 	at
> jdk.jlink/jdk.tools.jlink.internal.Main.run(Main.java:54) 	at jdk.jlink/jdk.tools.jlink.internal.Main.main(Main.java:33)
> Caused by: java.lang.module.InvalidModuleDescriptorException: Unsupported major.minor version 60.0
> 	at java.base/jdk.internal.module.ModuleInfo.invalidModuleDescriptor(ModuleInfo.java:1088)
> 	at java.base/jdk.internal.module.ModuleInfo.doRead(ModuleInfo.java:192)
> 	at java.base/jdk.internal.module.ModuleInfo.read(ModuleInfo.java:129)
> 	at java.base/jdk.internal.module.ModulePath.readJMod(ModulePath.java:395)
> 	at java.base/jdk.internal.module.ModulePath.readModule(ModulePath.java:343)
> 	... 9 more```

Ian Graves has updated the pull request incrementally with one additional commit since the last revision:

  Fixing formatting

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/409/files
  - new: https://git.openjdk.java.net/jdk/pull/409/files/bee11534..835e2902

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=409&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=409&range=01-02

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/409.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/409/head:pull/409

PR: https://git.openjdk.java.net/jdk/pull/409