Add CLI test for activation-key copy

Adresses #1704

Test results
------------
@Test: Copy Activation key for all valid Activation Key name ... ok
@Test: Copy Activation key for all valid Activation Key name ... ok
@Test: Copy Activation key for all valid Activation Key name ... ok
@Test: Copy Activation key for all valid Activation Key name ... ok
@Test: Copy Activation key for all valid Activation Key name ... ok
@Test: Copy Activation key for all valid Activation Key name ... ok

Proposed
-------------
Add cProfile-related items to .gitignore
Another formatting thing. Can you place this on a separate line? Even better, refactor out the `parent_key` dict:

```python
key_id = make_activation_key({u'organization-id': org_id}, cached=True)
try:
    result = ActivationKey.copy({
        u'id': key_id,
        u'new-name': new_name,
        u'organization-id': org_id,
    })
```