refactor: merge UserInfo and UserWithNamespace

[Panaetius]

Combines UserInfo and UserWithNamespace classes into a single user object that always has to have a namespace (as there are no users without a namespace.

[Panaetius]

This change is part of the following stack:

• refactor: merge UserInfo and UserWithNamespace #362 ◀

_{Change managed by git-spice.}

[coveralls]

Pull Request Test Coverage Report for Build 10881005641

Details

• 88 of 112 (78.57%) changed or added relevant lines in 11 files are covered.
• 6 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.1%) to 90.444%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
components/renku_data_services/authz/authz.py	2	3	66.67%
components/renku_data_services/message_queue/converters.py	7	8	87.5%
components/renku_data_services/namespace/orm.py	7	13	53.85%
components/renku_data_services/base_models/core.py	8	15	53.33%
components/renku_data_services/namespace/db.py	19	28	67.86%

Files with Coverage Reduction	New Missed Lines	%
components/renku_data_services/base_models/core.py	1	85.85%
components/renku_data_services/project/blueprints.py	1	96.67%
components/renku_data_services/storage/blueprints.py	1	94.76%
components/renku_data_services/namespace/db.py	3	85.88%

Totals
Change from base Build 10878688602:	-0.1%
Covered Lines:	9332
Relevant Lines:	10318

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💛 - Coveralls

[olevski]

Thanks for doing this Ralf. Just one minor change.