Add CLI test for activation-key copy

Adresses #1704

Test results
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@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
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Add cProfile-related items to .gitignore
Please drop this error message. It prevents the actual return code from being shown and doesn't tell the reader anything useful.