Create new MetadataInMemory class with enough metadata simulated to
schedule and launch workflows.
Properly respect abstraction for metadata for whitestar
Make output more robust by ensuring that it gets written on failure
Add whitestar-parallel for concurrent runs
Properly shutdown pool to avoid hang at end of lifecycle
Merge pull request #254 from SeqWare/feature/seqware-1949_metadata_in_memory

Feature/seqware 1949 metadata in memory