Refactor container modularity

DO NOT MERGE!

This PR addresses the following Jira tasks:
https://jira.oceanobservatories.org/tasks/browse/CIDEVCOI-651 (Modular capability container with varying capabilities)
https://jira.oceanobservatories.org/tasks/browse/CIDEVCOI-659 (Refactor datastore layer)

This PR will evolve based on feedback. Highlights:
- Container profiles are explicitly declared in config files
- Profiles can have selective container capabilities
- Profiles can change the implementation of capabilities (keeping the use interface the same)
- Profiles can change pyon.yml to adjust for that profile
- Gumstix profile is now possible