Fixing Lifecycle-Environments CLI tests.

Katello nightly (community upstream) has pushed an update where CLI and
possibly API uses the numeric ID for an organization and not its label.
This pull requests fixes LifeCycle-Environment tests only.

```bash
$ nosetests -c robottelo.properties tests/foreman/cli/test_lifecycleenvironment.py

@Test: Search lifecycle environment via its name containing UTF-8 chars ... SKIP: Test skipped due to #1077333 ASSIGNED   - Tomas Strachota - Cannot search lifecycle environment via its name if using UTF-8 characters
@Test: List subcommand returns standard output ... ok
@Test: Create lifecycle environment with valid name, prior to Library ... ok
@Test: Create lifecycle environment with valid name and description, ... ok
@Test: Create lifecycle environment with valid name, prior to Library ... ok
@Test: Create lifecycle environment then update its name ... SKIP: Test skipped due to #1095937 NEW        - Katello Bug Bin - Updating a lifecycle-environment name by passing an id raises an error
@Test: Create lifecycle environment then update its description ... SKIP: Test skipped due to #1095937 NEW        - Katello Bug Bin - Updating a lifecycle-environment name by passing an id raises an error

----------------------------------------------------------------------
XML: foreman-results.xml
----------------------------------------------------------------------
Ran 7 tests in 80.228s

OK (SKIP=3)
```