4592: Fix the nil error when a collection without a name is selected as input.
Also refactor the pipeline instances integration test to break re-run instance test into its own test.
4592: add test where a collection with no name is selected as input to a pipeline instance.
Merge branch 'master' into 4592-input-selection
Merge branch 'master' into 4592-input-selection
Merge branch 'master' into 4592-input-selection
4592: add fixture to be used by the api server test "search collections with 'any' operator".
4592: update fixture checksum
closes #4592
Merge branch '4592-input-selection'