Add test for Wirer on fixed-frequency transmons for OPX+ and Octave.

[deanpoulos]

We noticed some strange allocation resulting on the OPX+ and Octave when using the wirer tool with fixed-frequency transmons, but after writing the test-case, it couldn't be reproduced.

Now after running:

    qubits = [1, 2]
    qubit_pairs = [(1, 2), (2, 1)]

    connectivity = Connectivity()

    connectivity.add_resonator_line(qubits=qubits)
    allocate_wiring(connectivity, instruments_2lf_2mw)

    connectivity.add_qubit_drive_lines(qubits=qubits)
    allocate_wiring(connectivity, instruments_2lf_2mw, block_used_channels=False)

    connectivity.add_qubit_pair_zz_drive_lines(qubit_pairs)
    allocate_wiring(connectivity, instruments_2lf_2mw, block_used_channels=False)

    connectivity.add_qubit_pair_cross_resonance_lines(qubit_pairs)
    allocate_wiring(connectivity, instruments_2lf_2mw)

We get:

[github-actions]

Unit Test Results

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Results for commit 1568999.

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[deanpoulos]

@HiroQM can you please accept this? It's just a test-case, no need to review in my opinion

[HiroQM]

LGTM!