message: python: apply CV_OVERRIDE/CV_FINAL
diff: @@ -158,7 +158,7 @@ public:
  return u;
  }
  - UMatData* allocate(int dims0, const int* sizes, int type, void* data, size_t* step, int flags, UMatUsageFlags usageFlags) const
  + UMatData* allocate(int dims0, const int* sizes, int type, void* data, size_t* step, int flags, UMatUsageFlags usageFlags) const CV_OVERRIDE
  {
  if( data != 0 )
  {
  @@ -187,12 +187,12 @@ public:
  return allocate(o, dims0, sizes, type, step);
  }
  - bool allocate(UMatData* u, int accessFlags, UMatUsageFlags usageFlags) const
  + bool allocate(UMatData* u, int accessFlags, UMatUsageFlags usageFlags) const CV_OVERRIDE
  {
  return stdAllocator->allocate(u, accessFlags, usageFlags);
  }
  - void deallocate(UMatData* u) const
  + void deallocate(UMatData* u) const CV_OVERRIDE
  {
  if(!u)
  return;
  