Add ParseRun unit tests
Make volumes opts more strict
Add parseRun volume unit tests
Performance of deleteImageAndChildren.

Don't walk the file system for parents each time we recurse.

Fixes #2852
Merge pull request #2913 from pnasrat/2852-deleteimage-performance

Performance of deleteImageAndChildren.
Merge pull request #2892 from creack/add_cli_test-1

Add ParseRun unit tests