manage user and project domain separately

[jeje166]

Manage the project and user domain_name separately. resolves #334

[coveralls]

Coverage decreased (-0.1%) to 87.572% when pulling e4154d7cc4a948cbc72b267e7f814c45737f9480 on jeje166:support_multiple_domain_V3 into c3657b0a9addbf2d95984ac60547262f0fdd6d89 on ggiamarchi:master.

[jeje166]

Changes required implemented.

[ggiamarchi]

@jeje166 I refactored integration tests and split tests in separated files. There's a small conflit with your changes. I should have merged your PR first. My bad... Can you please fix it, then it will be good to merge

[jeje166]

@ggiamarchi conflict fixed ;)