message: Adding operator== in AliEmcalIterableContainer::iterator
  Needed for stl algo implementation in gcc7
diff: @@ -123,6 +123,7 @@ public:
  ~iterator(){}
  bool operator!=(const iterator &ref) const;
  + bool operator==(const iterator &ret) const;
  iterator &operator++();
  iterator operator++(int);
  @@ -408,6 +409,16 @@ bool AliEmcalIterableContainerT<T, STAR>::iterator::operator!=(const AliEmcalIte
  return fCurrent != ref.fCurrent;
  }
  +/**
  + * Comparison operator for equalness. Comparison is performed based on the position inside the container
  + * @param[in] ref Reference for comparison
  + * @return True if the position does not match, false otherwise
  + */
  +template <typename T, typename STAR>
  +bool AliEmcalIterableContainerT<T, STAR>::iterator::operator==(const AliEmcalIterableContainerT<T, STAR>::iterator &ref) const{
  + return fCurrent == ref.fCurrent;
  +}
  +
  /**
  * Prefix increment operator. Incrementing / decrementing position of the
  * iterator based on the direction.
  