Common:
- added slice to EventTools

OFC'22 tests:
- corrected OFC'22 delete service test to identify appropriate service to be deleted
- removed usage of events for testing

Compute:
- remove diversity constraint when not populated

Device:
- removed unused field in database and code polishing

Service:
- migrated L3NMEmulatedServiceHandler to the new API
- polishing of code

- Arranged .gitignore & .gitkeep files in common proto folder
- Created specific run_tests_locally script for Context component
- Moved imports from *.proto folder to common.proto folder
- Adapted common.tools.object_factory to new proto definitions for ConfigRule and Constraint
- Extended common.tools.type_checkers to new proto definitions for ConfigRule and Constraint
- Removed context's genproto.sh script
- Adapted Events generated to new timestamp data type
- Minor code and linting fixing