Re-enable smpc automated tests
Created by: ThanKarab
Changelog:
- Upgraded smpc image to v7.
- Minor fix for monetdb caching, all cached should have the '-3' suffix.
- Reenabled smpc standalone tests and smpc env tests. Jira
- Minor smpc test fixes to align with new version of mip-engine.
- The smpc standalone tests should not use the CerelyWrapper but the CeleryApp direclty.
- Added configuration in the smpc configs so that the standalone tests can connect with an external smpc cluster.