Leica: prevent IOOB exception when linking EmissionFilter

This prevents the reader from attempting to link an EmissionFilter to
e.g. Channel:1 before Channel:0.

See QA 9255.
Leica: more sensible filter/channel linking

Only attempts to link to channels that exist, rather than attempting to link
all channels and catching an exception if that fails.
Merge pull request #1154 from melissalinkert/leica-filter

Leica: prevent exception when linking EmissionFilter
merge develop -Dnone -Ibreaking -Eexclude -Ssuccess-only: PR 1362 (Make FormatReader's RandomAccessInputStream transient)
merge develop -Dnone -Ibreaking -Eexclude -Ssuccess-only

Repository: openmicroscopy/bioformats
Excluded PRs:
  # PR 1296 melissalinkert 'Add test for getRequiredDirectories' (user: melissalinkert)
  # PR 1177 rleigh-dundee 'specification: Add metadata for HDF5 embedding' (exclude comment)
  # PR 1249 PremyslFiala 'ND2 - Bug fixes' (user: PremyslFiala)
  # PR 816 melissalinkert 'Add support for multi-channel Volocity Clipping datasets' (user: melissalinkert)
  # PR 858 melissalinkert 'Initial support for Veeco AFM data' (user: melissalinkert)
  # PR 1309 melissalinkert 'Allow tile-based access of large JPEG-2000 images' (exclude comment)
  # PR 1265 qidane 'New units' (status: failure)
  # PR 857 melissalinkert 'Initial support for Zeiss .lms files' (user: melissalinkert)
  # PR 1161 sommerc 'Initial CellH5 Reader class' (user: sommerc)
  # PR 1015 qidane 'Messy binary' (exclude comment)
Updating 613124f..04a09b0
Previously merged:
  # PR 1154 melissalinkert 'Leica: prevent exception when linking EmissionFilter'

Merged PRs:
  # PR 1362 melissalinkert 'Make FormatReader's RandomAccessInputStream transient'

Generated by OME-5.1-breaking-push#107 (http://ci.openmicroscopy.org/job/OME-5.1-breaking-push/107/)