added iteration to case data for drivers
Merge branch 'caselabelfix' of github.com:naylor-b/OpenMDAO-Framework into caselabelfix
changed 'iteration' to 'driver.workflow.itername
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into caselabelfix
incomplete change
added test for driver case labeling
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into caselabelfix
Merge pull request #1276 from naylor-b/caselabelfix

moved iteration coordinate out of Case label and into workflow.itername metadata