Make Artisan to not require database connection when not needed, other improvements
Summary:
- remove requirement on DB connection to get object properties available for update
- make all scalpel commands hidden (a few of them were not hidden)
- removed some redundant code
Test Plan: ./phpunit
Reviewers: #hkccp_developers, mollekopf
Reviewed By: #hkccp_developers, mollekopf
Subscribers: #hkccp_developers
Differential Revision: https://git.kolab.org/D4388