Revert "Change collider match check to is_identical"

This reverts commit 4743a3d.

Author: JacksonBurns

rmgpy/reaction.py

@@ -620,7 +620,7 @@ def is_isomorphic(self, other, either_direction=True, check_identical=False, che
         elif other.specific_collider is None:
             collider_match = False
         else:
-            collider_match = self.specific_collider.is_identical(other.specific_collider)
+            collider_match = self.specific_collider.is_isomorphic(other.specific_collider)
 
         # Return now, if we can
         if forward_reactants_match and forward_products_match and collider_match: