[marketplace] Rename _freeSlot() -> _forciblyFreeSlot()

contracts/Marketplace.sol

@@ -118,7 +118,7 @@ contract Marketplace is Collateral, Proofs {
     }
   }
 
-  function _freeSlot(SlotId slotId)
+  function _forciblyFreeSlot(SlotId slotId)
     internal
     slotMustAcceptProofs(slotId)
     marketplaceInvariant

contracts/Storage.sol

@@ -94,7 +94,7 @@ contract Storage is Collateral, Marketplace {
         // When the collateral drops below the minimum threshold, the slot
         // needs to be freed so that there is enough remaining collateral to be
         // distributed for repairs and rewards (with any leftover to be burnt).
-        _freeSlot(slotId);
+        _forciblyFreeSlot(slotId);
       }
     }
   }

contracts/TestMarketplace.sol

@@ -26,8 +26,8 @@ contract TestMarketplace is Marketplace {
     return _isSlotCancelled(slotId);
   }
 
-  function freeSlot(SlotId slotId) public {
-    _freeSlot(slotId);
+  function forciblyFreeSlot(SlotId slotId) public {
+    _forciblyFreeSlot(slotId);
   }
 
   function slot(SlotId slotId) public view returns (Slot memory) {

test/marketplace.js

@@ -20,7 +20,7 @@ async function waitUntilFailed(contract, request, slot) {
   for (let i = 0; i <= request.ask.maxSlotLoss; i++) {
     slot.index = i
     let id = slotId(slot)
-    await contract.freeSlot(id)
+    await contract.forciblyFreeSlot(id)
   }
 }