TCI - Create real EObjects instead of dynamic ones in DynamicEcoreFactory

In some migration scenarios, the Edapt migration cannot handle
references to meta objects (e.g. EStructuralFeatures) if they are
created as DynamicEObjects during migration.
Thus, adapt the DynamicEcoreFactory to create "real" EObjects instead.

Change-Id: I851f057bb489f78917623a6050622f1ad1f60661
Signed-off-by: Lucas Koehler <lkoehler@eclipsesource.com>