Generate required lances for manual AtB contracts for StratCon init

[jslater89]

StratCon initialization requires a nonzero requiredLances to generate a nonzero number of tracks, and zero tracks causes a division by zero further along in initialization.

Solves issue #5181.

[IllianiCBT]

I thought we fixed this? Clearly not :D

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 10.51%. Comparing base (bce5f63) to head (65f2aa2).
Report is 48 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5232      +/-   ##
============================================
- Coverage     10.52%   10.51%   -0.01%     
+ Complexity     6047     6043       -4     
============================================
  Files           957      957              
  Lines        134523   134525       +2     
  Branches      19545    19545              
============================================
- Hits          14154    14150       -4     
- Misses       119018   119026       +8     
+ Partials       1351     1349       -2     

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