Initial update to FileLinker
Refactor  plugin testing
Tests in progress
Add missing -Xmx args to oozie-sge scripts (mirroring pegasus' implementation).
Test out FileLinker for all behaviour
Fix up refactored test
Properly format Xmx option, and guard against invalid values.
Merge pull request #107 from SeqWare/feature/SEQWARE-1733_metadata_clean_up_part2

Feature/seqware 1733 metadata clean up part2
Merge pull request #106 from SeqWare/feature/xmx

Add missing -Xmx args to oozie-sge scripts (mirroring pegasus' implement...