SourceReaperOverlord not optimized for center core rooms

[zGeneral]

Issue summary

1. Source Reapers are spawned in center SK rooms all the time (no need as there are no Lairs)
2. Source Reapers and defenders stuck in goTo(this.pos) state.

Description of issue:

Code 1:
this.wishlist(1, CombatSetups.zerglings.sourceKeeper);

Code 2:
// the below applies to reapers and defenders
if (!this.targetLair || !this.room || reaper.room != this.room || reaper.pos.isEdge) {
// log.debugCreep(reaper, Going to room!);
reaper.healSelfIfPossible();
reaper.goTo(this.pos);
return;
}

//in the above, !this.targetLair will always return true as there are no LairStructures in center core rooms

Steps to reproduce:

Error message:

// Console output:

// Offending line:

Suggested fix (optional):

Other information:

• Overmind version: {found in package.json or by typing info() into console}
  • Commit hash: {optional, but helpful: include the commit hash (if known)}