Use RoomMap::insert() in regular builds.

client/src/room/map.rs

@@ -33,7 +33,6 @@ impl RoomMap {
 
   /// Inserts the given room in the map under the given name.
   /// Same semantics as `std::collections::HashMap::insert()`.
-  #[cfg(test)]
   pub fn insert(&mut self, name: String, room: Room) -> Option<Room> {
     self.map.insert(name, room)
   }
@@ -76,7 +75,7 @@ impl RoomMap {
         room
       }
     };
-    if let Some(_) = self.map.insert(name, room) {
+    if let Some(_) = self.insert(name, room) {
       error!("Room present twice in room list response");
     }
   }