OME-TIFF: close helper readers when working with single-plane files

The reader will be left open if only a tile was read, but if the full
plane from a single plane file is read then the helper reader will be
closed.  This reduces the memory usage for datasets that consist of many
single plane files.

Fixes #12219.
Change file closing check to look for lower-right-most tile
merge develop -D org: PR 983 (Woolz: make sure the service is initialized when calling openBytes (rebased onto develop))
merge develop -D org: PR 1154 (Leica: prevent exception when linking EmissionFilter)
merge develop -D org: PR 1164 (Add modulo support for LI-FLIM data)
merge develop -D org: PR 1178 (Nikon .nd2 fixes, part 2 (rebased onto develop))
merge develop -D org: PR 1187 (ScanR: fix exposure time units)
merge develop -D org: PR 1191 (FakeReader improvements, part 1)
merge develop -D org: PR 1192 (DICOM: fix units for physical sizes)
merge develop -D org: PR 1193 (Leica LIF: do not set Channel.Color for RGB images)
merge develop -D org: PR 1194 (CZI: prevent NumberFormatExceptions on missing/invalid position values (rebased onto develop))
merge develop -D org: PR 1195 (OME-TIFF: close helper readers when working with single-plane files (rebased onto develop))
merge develop -D org

Repository: openmicroscopy/bioformats
Excluded PRs:
  # PR 1161 sommerc 'Initial CellH5 Reader class' (user: sommerc)
  # PR 858 melissalinkert 'Initial support for Veeco AFM data' (label: exclude)
  # PR 1136 melissalinkert 'Add initial support for reading BinaryOnly OME-TIFF datasets (rebased onto develop)' (label: exclude)
  # PR 1141 LeeKamentsky 'Reader for Amaris FlowSight .cif format' (label: exclude)
  # PR 816 melissalinkert 'Add support for multi-channel Volocity Clipping datasets' (label: exclude)
  # PR 1177 rleigh-dundee 'specification: Add metadata for HDF5 embedding' (exclude comment)
  # PR 978 berl 'Add writing of .v3draw format for easy loading with Vaa3D.' (user: berl)
  # PR 857 melissalinkert 'Initial support for Zeiss .lms files' (label: exclude)
  # PR 1015 qidane 'Messy binary' (exclude comment)
  # PR 1054 qidane 'Additional annotation points throughout the model' (exclude comment)
Already up-to-date.

Merged PRs:
  # PR 983 melissalinkert 'Woolz: make sure the service is initialized when calling openBytes (rebased onto develop)'
  # PR 1154 melissalinkert 'Leica: prevent exception when linking EmissionFilter'
  # PR 1164 melissalinkert 'Add modulo support for LI-FLIM data'
  # PR 1178 melissalinkert 'Nikon .nd2 fixes, part 2 (rebased onto develop)'
  # PR 1187 melissalinkert 'ScanR: fix exposure time units'
  # PR 1191 melissalinkert 'FakeReader improvements, part 1'
  # PR 1192 melissalinkert 'DICOM: fix units for physical sizes'
  # PR 1193 melissalinkert 'Leica LIF: do not set Channel.Color for RGB images'
  # PR 1194 melissalinkert 'CZI: prevent NumberFormatExceptions on missing/invalid position values (rebased onto develop)'
  # PR 1195 melissalinkert 'OME-TIFF: close helper readers when working with single-plane files (rebased onto develop)'
Generated by OMERO-5.1-merge-push#317 (http://ci.openmicroscopy.org/job/OMERO-5.1-merge-push/317/)