Impl/tyr backbone

[Paldiu]

Changes:

Patchwork

• Renamed FreedomExecutor to ExecutorProvider and moved the class to the provider package.
• Created an SQL Registry to prevent dependencies on Datura for SQL data. SQL is returned through an Optional, in the event that there is no SQL service registered.
• Created SQLResult, a generic ORM for ResultSets to avoid working directly with SQL data.

Tyr

• Created Identity, which houses a username and related secret key.
• Created SQLEntry which stores the information from the Identity class into an SQL table called sessionData.
• Created TOTP, a simple static class that allows easy access to TimeBasedOneTimePasswordUtils class.
• Created OAuth2 which houses identities and performs the appropriate credential validations (incomplete)