GreedyMapper doesn't respect initial search cycles

[kevinhartman]

Specifying initialSearchCycles as 0 does not seem to work when GreedyMapper is used.

This means that some "pure" swaps are still performed at the start of the circuit, meaning that the initial layout becomes no longer trivial.

Until this is fixed, users should expect that libtoqm may end up using a non-trivial initial layout. For qiskit-toqm, this means ToqmSwap needs to always check for updates to the layout, even if initialSearchCycles was passed as 0.