Add get_fields method to orm.Entity
Add class `Model` to module `robottelo.entities`

This new class represents a "Model" entity in the Satellite application. For
reference material, see `apidoc/v2/models` on a Satellite deployment.
Merge pull request #934 from Ichimonji10/entities

Add class `Model` to module `robottelo.entities`
Merge pull request #925 from elyezer/orm-get-fields

Add get_fields method to orm.Entity
Implement orm.OneToManyField
Merge pull request #926 from elyezer/orm-one-to-many-field

Implement orm.OneToManyField
Remove skip for the CLI content views testcase

The bug is verified and also by having the decorator was causing the bug
reported on #936
Remove skip for the CLI subscription testcase

The bug is verified and also by having the decorator was causing the bug
reported on #936
Update bz bug to skip CLI content host test
Improve CLI OS test_bugzilla_1051557
Remove skip for the CLI template testcase

The bug is verified and also by having the decorator was causing the bug
reported on #936
Update CLI activation key update tests
Update CLI Organization test_add_user
Skip CLI org tests due to description update bug