ticket 489 - metadata: log error message if no file is found

[JimHofman]

Description

• Add code to the PGE's to test for the existence of a product file that yields metadata when collected metadata

Affected Issues

• N/A

Testing

• Updated 5 unit tests to
• Added code but did not add test code to pge's (see comments below)

[JimHofman]

Scott I'm glad you made this request because I realized I did not cover the new code in a couple of unit tests.