Merge branch 'fix/add_revision_type_to_revision' of github.com:tracim/tracim_backend into fix/add_revision_type_to_revision

tracim/views/core_api/schemas.py

 from tracim.models.context_models import WorkspaceAndContentPath
 from tracim.models.context_models import ContentFilter
 from tracim.models.context_models import LoginCredentials
-from tracim.models.data import UserRoleInWorkspace, ActionDescription
+from tracim.models.data import UserRoleInWorkspace
+from tracim.models.data import ActionDescription
 
 
 class UserDigestSchema(marshmallow.Schema):