SQLAlchemy-Utils 0.33 not supported.

[jma]

This cause an error:

web_1            |   File "/home/invenio/reroils/src/invenio-oauth2server/invenio_oauth2server/models.py", line 37, in <module>
web_1            |     from sqlalchemy_utils.types.encrypted import AesEngine, EncryptedType
web_1            | ImportError: cannot import name 'AesEngine'

[jacquerie]

Same underlying issue as inveniosoftware/invenio-oauthclient#159, #171 and a new release should fix the problem. For now the workaround is to pin the dependency in the application, like inspirehep/inspire-next@828856e.