BUG: Fix memory leak in itkTubeTubeExtractorTest

Change-Id: I07f040ac40a2a4d9b587c2099076b31b8459ae47
BUG: Fix memory leak in RegisterUsingSlidingGeometries

Change-Id: I783a59d72ff08caea704a859da3db771e4c26aa0
BUG: Fix memory leak in itkAnisotropicDiffusiveRegistrationRegularizationTest

Change-Id: I682fc8aa688e1930b4649dba566570b6d5908a78
BUG: Fix memory leaks in AnisotropicDiffusiveSparseRegistrationFilter

Change-Id: Ic15b451d2a60d4544b074cf48a345a748bfb4576
Merge topic 'AnisotropicDiffusiveRegistrationRegularizationTestMemoryLeak'

25c5478 BUG: Fix memory leak in itkAnisotropicDiffusiveRegistrationRegularizationTest
Merge topic 'AnisotropicDiffusiveSparseRegistrationFilterMemoryLeaks'

df3b18e BUG: Fix memory leaks in AnisotropicDiffusiveSparseRegistrationFilter
Merge topic 'RegisterUsingSlidingGeometriesMemoryLeak'

a7b7cd5 BUG: Fix memory leak in RegisterUsingSlidingGeometries
Merge topic 'TubeTubeExtractorTestMemoryLeak'

592b4c3 BUG: Fix memory leak in itkTubeTubeExtractorTest