Fixed 2 CLI failures related to lifecycle env.

The CLI ``list`` method for ``lifecycle-environment`` takes 2 arguments
and not a single dictionary.

```bash
======================================================================
ERROR: @Test: Check if an environment can be added to an Org
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/jenkins/workspace/foreman-compose-cli/tests/cli/test_org.py", line 642, in test_add_environment
    new_env = environment.stdout[0]
IndexError: list index out of range

======================================================================
ERROR: @Test: Check if an Environment can be removed from an Org
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/jenkins/workspace/foreman-compose-cli/tests/cli/test_org.py", line 667, in test_remove_environment
    new_env = environment.stdout[0]
IndexError: list index out of range
```

With the proposed fix:

```bash
$ nosetests -c robottelo.properties
tests/cli/test_org.py:TestOrg.test_add_environment tests/cli/test_org.py:TestOrg.test_remove_environment

@Test: Check if an environment can be added to an Org ... ok
@Test: Check if an Environment can be removed from an Org ... ok

----------------------------------------------------------------------
XML: foreman-results.xml
----------------------------------------------------------------------
Ran 2 tests in 48.855s

OK
```
Merge pull request #544 from omaciel/fix-cli-tests

Fixed 2 CLI failures related to lifecycle env.