Adjustments to run on iSeries

Use QSYS2 objects instead of SYSIBM objects to get column names and
procedure parameters.
Clarify UnsupportedOperationException
Additional Adjustments for iSeries

Fix table names qualified by a schema (library)
Acceptance Test Improvements
Remove DECFLOAT
Merge pull request #1 from mikepatrick/iSeriesDbFit

Create CdsDbFit