Added two tests for activation key copy

First test verifies that you cannot use a name already taken.
Second test verifies that subscriptions are being copied over.
```
@Test: Copy activation key with duplicate name ... ok
@Test: Copy Activation and verify contents ... ok
```
Bonus: Added the beginings of an activation key search.
:+1: on @Ichimonji10's suggestions. The idea is to make more clear for others to understand what you are looking for as list indexes does not says much and the order could change in future product releases.