ij-omero-server: use less confusing method names

There were many "convert*" methods and it was difficult to keep track of
what they all did. This change renames the methods responsible for
converting from ImageJ ModuleInfo/ModuleItem to OMERO JobParams/Param.
Refactor conversion methods into an ImageJ service

This allows conversion logic to be overridden if needed.
Add Eclipse APT metadata for SezPoz operation

Otherwise, SezPoz does not work incrementally from within Eclipse.