nazca #116940 The equality threshold shouldn’t be hard written. [validation pending]

In the alignall_iterative, the equality_threshold used to determine whether the alignment is perfect or not is hard written. It shouldn’t.

prioritynormal
typeenhancement
done in0.2.0
load0.010
load left0.000
closed by#7498d98cde7a [aligner] Enable the user to customize the equality_threshold (closes #116940)
patch[aligner] Enable the user to customize the equality_threshold (closes #116940) [applied]