ImageJ: disable file grouping when not reading from the filesystem

In particular, this disables grouping when reading over HTTP, as that is
at best extremely slow.

Fixes #12158.
target-test-runner: exclude package and log4j jars

Fixes #12114.
Merge pull request #1107 from melissalinkert/rebased/develop/test-runner-classpath

Exclude log4j and packages from target-test-runner (rebased onto develop)
Merge pull request #1099 from melissalinkert/rebased/develop/disable-group-files

Disable file grouping in ImageJ remote import plugin (rebased onto develop)
Update auto-generated documentation

Repository: openmicroscopy/bioformats
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