Update CLI organization environments tests.

Organizations use "Lifecycle-Environments" and not what Foreman calls
"environments", so our two existing Organization tests that add/remove
environments needed to be updated. I have updated the code to add a new
"make_lifecycle_environment" method as well.

```python
In [1]: from robottelo.cli.lifecycleenvironment import LifecycleEnvironment
INFO ssh:63: Paramiko instance prepared (and would be reused): 0x10326fd90

In [2]: foo = LifecycleEnvironment.list({'organization-id': 'ACME_Corporation'})

In [3]: foo.stdout
Out[3]: [{'id': '1', 'name': 'Library'}, {'id': '86', 'name': 'DEV'}]

In [4]: foo = LifecycleEnvironment.list({'organization-id': 'ACME_Corporation', 'library': 1})

In [5]: foo.stdout
Out[5]: [{'id': '1', 'name': 'Library'}]

In [6]: foo = LifecycleEnvironment.list({'organization-id': 'ACME_Corporation', 'name': 'DEV'})

In [7]: foo.stdout
Out[7]: [{'id': '86', 'name': 'DEV'}]

In [8]: from robottelo.cli.factory import make_lifecycle_environment

In [9]: make_lifecycle_environment({'organization-id': 'ACME_Corporation'})
Out[9]:
{'description': '""',
 'id': '124',
 'label': '2nwbudt',
 'library': '""',
 'name': '2nwbudt',
 'organization': 'ACME_Corporation',
 'organization-id': 'ACME_Corporation',
 'prior': '1',
 'prior-lifecycle-environment': 'Library'}

In [10]: make_lifecycle_environment({'organization-id': 'ACME_Corporation', 'prior': 124})
Out[10]:
{'description': '""',
 'id': '125',
 'label': 'xaz6uq',
 'library': '""',
 'name': 'xaz6uq',
 'organization': 'ACME_Corporation',
 'organization-id': 'ACME_Corporation',
 'prior': 124,
 'prior-lifecycle-environment': '2nwbudt'}
```