Feat/186 experiment refactor

Created by: KFilippopolitis

Changelog:

1. Major cleanup on the database objects/DAOs/DTOs.
2. Upgraded all the dependencies.
3. New Keycloak handling with integrated library.
4. Refactored the experiments.
5. Added CRUD on the experiments.
6. Service layer added.
7. Improved exception handling.
8. Added non-dockerised way of developing
9. Env Variables cleanup.
10. Backwards Compatibility.

Created by: ghost

DeepCode's analysis on #9d9bf6 found:

• 1 critical issue, 2 warnings, 2 minor issues.
• 1 issue was fixed.

Top issues

Description	Example fixes
CSRF protection is disabled by disable. This allows the attackers to execute requests on a user's behalf. Occurrences: SecurityConfiguration.java:68	Example fixes
Cookie misses a call to setSecure. Set the Secure flag to true to protect the cookie from man-in-the-middle attacks. Occurrences: SecurityConfiguration.java:82	Example fixes
Either rethrow this java.lang.InterruptedException or set the interrupted flag on the current thread with 'Thread.currentThread().interrupt()'. Otherwise the information that the current thread was interrupted will be lost. Occurrences: ExperimentService.java:722	Example fixes

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Created by: ThanKarab

Review: Approved

Merged by: ThanKarab at 2021-01-15 19:09:44 UTC