Merge pull request #508 from ctrueden/prairie-fixes-dev_4_4

Prairie fixes
merge dev_4_4 -D org -I include -E exclude: PR 507 (CellomicsReader: Improve performance of initFile)
merge dev_4_4 -D org -I include -E exclude: PR 509 (ScanR: clear the pixel buffer when an invalid TIFF is found)
merge dev_4_4 -D org -I include -E exclude: PR 511 (AbstractOMEXMLMetadata: Deprecate methods removed on develop)