LI-FLIM: add modulo support for phase and frequency data

Phases are added to ModuloT; frequencies are added to ModuloZ.  This is
consistent with how phases/frequencies are handled in other formats.

Fixes #12290.
Tidy up a few lingering series population issuse

The series count is now at most 2, so extra bookkeeping to divide
primary images from background images is not necessary.
ScanR: fix exposure time units

See http://www.openmicroscopy.org/community/viewtopic.php?f=13&t=7554
CZI: prevent NumberFormatExceptions on missing/invalid position values

Fixes QA 9382.
Merge pull request #1194 from melissalinkert/rebased/develop/qa9382

CZI: prevent NumberFormatExceptions on missing/invalid position values (rebased onto develop)
Merge pull request #1187 from melissalinkert/scanr-exposure

ScanR: fix exposure time units
Merge pull request #1164 from melissalinkert/liflim-modulo

Add modulo support for LI-FLIM data