Memory leaks

[bpaniagua]

Slicer version: 4.11.0-2019-12-02 r28659
OS: Ubuntu 16.04

Mesh To Label Map standard error:

vtkDebugLeaks has detected LEAKS!
Class "9vtkBufferIxE" has 1 instance still around.
Class "vtkCellData" has 2 instances still around.
Class "vtkInformationIntegerVectorValue" has 9 instances still around.
Class "vtkInformationVector" has 18 instances still around.
Class "vtkPointData" has 2 instances still around.
Class "vtkCompositeDataPipeline" has 1 instance still around.
Class "vtkPolyDataReader" has 1 instance still around.
Class "vtkTrivialProducer" has 2 instances still around.
Class "vtkPoints" has 2 instances still around.
Class "vtkIntArray" has 1 instance still around.
Class "vtkInformation" has 36 instances still around.
Class "vtkInformationStringVectorValue" has 3 instances still around.
Class "vtkMultiThreader" has 1 instance still around.
Class "vtkInformationIntegerPointerValue" has 2 instances still around.
Class "vtkPolyData" has 1 instance still around.
Class "vtkIdList" has 1 instance still around.
Class "vtkDoubleArray" has 1 instance still around.
Class "vtkAlgorithmOutput" has 2 instances still around.
Class "vtkImageStencilData" has 1 instance still around.
Class "vtkInformationIntegerValue" has 83 instances still around.
Class "vtkCellArray" has 1 instance still around.
Class "vtkImageData" has 1 instance still around.
Class "vtkInformationStringValue" has 4 instances still around.
Class "vtkFloatArray" has 2 instances still around.
Class "vtkInformationExecutivePortVectorValue" has 2 instances still around.
Class "vtkIdTypeArray" has 1 instance still around.
Class "vtkVoxel" has 1 instance still around.
Class "vtkFieldData" has 3 instances still around.
Class "vtkInformationIterator" has 4 instances still around.
Class "vtkInformationDoubleVectorValue" has 8 instances still around.
Class "vtkStreamingDemandDrivenPipeline" has 2 instances still around.
Class "vtkImageStencil" has 1 instance still around.
Class "vtkReaderExecutive" has 1 instance still around.
Class "9vtkBufferIfE" has 2 instances still around.
Class "9vtkBufferIdE" has 1 instance still around.
Class "vtkCommand or subclass" has 3 instances still around.
Class "9vtkBufferIiE" has 1 instance still around.
Class "vtkInformationExecutivePortValue" has 4 instances still around.