| Elektra 0.11.0

Use Case: Assert that certain keys contain specific values

# Summary

- Title: Assert that certain keys contain specific values
- Scope: ansible-libelektra
- Level: User goal
- Actors: System administrator
- Brief: There should be a functionality in ansible-libelektra to assert certain keys have certain values. For example, some app B requires that a certain app A is already set up and running before configuring can be done. It may also be used to check that a certain plugin (e.g. `check`) is correctly installed within Elektra.

# Scenarios

- Precondition: The user asserts a certain value for a key in the task
- Main success scenario: The key on the target machine meets the assertion -> continue the execution
- Alternative scenario: The key on the target machine does not meet the assertion -> fail the execution
- Error scenario: -
- Postcondition: -
- Non-functional Constraints: -