Improved marketplace creation tests.
Improved marketplace creation tests.

Now those tests includes some admin operations related to the creation
of marketplaces for other users.

rockneurotiko/wirecloud,jpajuelo/wirecloud,jpajuelo/wirecloud,rockneurotiko/wirecloud,jpajuelo/wirecloud,rockneurotiko/wirecloud,rockneurotiko/wirecloud,jpajuelo/wirecloud