AlchemyCategory and Tag Factory name generation is broken

[elbenfreund]

When the factories for AlchemyCategory and AlchemyTag generate names they do not seem to use the actual return value of their word faker but its string representation.
For all intends and purposes with regards to testing this seems good enough, nevertheless it indicates an issue that should be fixed.

Example:

[[4] u'<factory.faker.Faker object at 0x7f2e9dcf6490> - 4', [5] u'<factory.faker.Faker object at 0x7f2e9dcf60d0> - 5', [6] u'<factory.faker.Faker object at 0x7f2e9dcf6190> - 6', [7] u'<factory.faker.Faker object at 0x7f2e9dcff290> - 7']