Rename plugin from eliatrasuite to eliatra-suite
Only because we would prefer the latter name.
Note: This might also have effects on
- Integration Tests (as the int tests on main are not working atm, this should be done first for the compat edition)
- The setup_test_instance.sh script
- The eliatra-suite-test-instance-installer.sh script
- The install_demo_configuration.sh script
- Other stuff?