Fix Default Types in s3Index

[humpalum]

Your checklist for this pull request

• [x] I've read the contributing guideline.
• [x] I've tested my changes by building and running mquery, and testing changed functionality (if applicable)
• [ ] I've added automated tests for my change (if applicable, optional)
• [ ] I've updated documentation to reflect my change (if applicable)

What is the current behaviour? The default is not set when no types are given

What is the new behaviour? Sets the default

Test plan --> Run s3index with no --types. If it Indexes with all the types its good. --> Run with --types and make sure its not getting overwritten.

Closing issues