message: Add named constant to StorageTanks.h
diff: #include "Structure.h"
  +const int StorageTanksCapacity = 1000;
  +
  class StorageTanks : public Structure
  {
  public:
  @@ -13,7 +15,7 @@ public:
  requiresCHAP(false);
  - storage().capacity(1000);
  + storage().capacity(StorageTanksCapacity);
  }
  protected:
  