BUG: Fix SpatialObjectsHeaderTest build error.
BUG: Fix SpatialObjectsHeaderTest build error.

[Modularization] Build error caused by missing header in MetaEvent.h.
The use of ITK_EXPORT requires itkMacro.h.

Change-Id: I3a3142f5baa68766d8bcf19fa3441bef4907c8fc

hinerm/ITK,ajjl/ITK,rhgong/itk-with-dom,paulnovo/ITK,fuentesdt/InsightToolkit-dev,LucHermitte/ITK,hendradarwin/ITK,cpatrick/ITK-RemoteIO,itkvideo/ITK,BRAINSia/ITK,stnava/ITK,fbudin69500/ITK,jmerkow/ITK,fuentesdt/InsightToolkit-dev,PlutoniumHeart/ITK,blowekamp/ITK,malaterre/ITK,zachary-williamson/ITK,CapeDrew/DCMTK-ITK,fuentesdt/InsightToolkit-dev,ajjl/ITK,richardbeare/ITK,spinicist/ITK,InsightSoftwareConsortium/ITK,fbudin69500/ITK,biotrump/ITK,vfonov/ITK,vfonov/ITK,fbudin69500/ITK,hinerm/ITK,rhgong/itk-with-dom,heimdali/ITK,GEHC-Surgery/ITK,hinerm/ITK,daviddoria/itkHoughTransform,malaterre/ITK,jcfr/ITK,hendradarwin/ITK,msmolens/ITK,CapeDrew/DITK,Kitware/ITK,ajjl/ITK,hendradarwin/ITK,itkvideo/ITK,msmolens/ITK,malaterre/ITK,jmerkow/ITK,richardbeare/ITK,blowekamp/ITK,fedral/ITK,BRAINSia/ITK,richardbeare/ITK,richardbeare/ITK,vfonov/ITK,CapeDrew/DCMTK-ITK,hinerm/ITK,hjmjohnson/ITK,rhgong/itk-with-dom,jmerkow/ITK,InsightSoftwareConsortium/ITK,stnava/ITK,spinicist/ITK,heimdali/ITK,spinicist/ITK,jmerkow/ITK,heimdali/ITK,atsnyder/ITK,Kitware/ITK,jcfr/ITK,daviddoria/itkHoughTransform,fedral/ITK,jcfr/ITK,wkjeong/ITK,fedral/ITK,malaterre/ITK,biotrump/ITK,hjmjohnson/ITK,daviddoria/itkHoughTransform,fbudin69500/ITK,blowekamp/ITK,cpatrick/ITK-RemoteIO,cpatrick/ITK-RemoteIO,LucHermitte/ITK,BlueBrain/ITK,stnava/ITK,cpatrick/ITK-RemoteIO,GEHC-Surgery/ITK,CapeDrew/DITK,fbudin69500/ITK,jcfr/ITK,fuentesdt/InsightToolkit-dev,msmolens/ITK,LucHermitte/ITK,zachary-williamson/ITK,rhgong/itk-with-dom,LucasGandel/ITK,GEHC-Surgery/ITK,hinerm/ITK,cpatrick/ITK-RemoteIO,ajjl/ITK,fedral/ITK,vfonov/ITK,PlutoniumHeart/ITK,eile/ITK,LucasGandel/ITK,hjmjohnson/ITK,CapeDrew/DITK,InsightSoftwareConsortium/ITK,InsightSoftwareConsortium/ITK,jcfr/ITK,BlueBrain/ITK,daviddoria/itkHoughTransform,jmerkow/ITK,CapeDrew/DCMTK-ITK,CapeDrew/DITK,atsnyder/ITK,LucHermitte/ITK,wkjeong/ITK,jmerkow/ITK,InsightSoftwareConsortium/ITK,cpatrick/ITK-RemoteIO,wkjeong/ITK,atsnyder/ITK,malaterre/ITK,daviddoria/itkHoughTransform,fedral/ITK,vfonov/ITK,atsnyder/ITK,atsnyder/ITK,spinicist/ITK,thewtex/ITK,thewtex/ITK,GEHC-Surgery/ITK,LucHermitte/ITK,fuentesdt/InsightToolkit-dev,malaterre/ITK,hinerm/ITK,BlueBrain/ITK,ajjl/ITK,spinicist/ITK,spinicist/ITK,zachary-williamson/ITK,eile/ITK,biotrump/ITK,eile/ITK,richardbeare/ITK,heimdali/ITK,fbudin69500/ITK,PlutoniumHeart/ITK,daviddoria/itkHoughTransform,zachary-williamson/ITK,CapeDrew/DCMTK-ITK,LucasGandel/ITK,stnava/ITK,GEHC-Surgery/ITK,CapeDrew/DCMTK-ITK,CapeDrew/DITK,biotrump/ITK,spinicist/ITK,vfonov/ITK,fuentesdt/InsightToolkit-dev,vfonov/ITK,cpatrick/ITK-RemoteIO,heimdali/ITK,BlueBrain/ITK,biotrump/ITK,BlueBrain/ITK,msmolens/ITK,daviddoria/itkHoughTransform,zachary-williamson/ITK,jmerkow/ITK,hendradarwin/ITK,msmolens/ITK,zachary-williamson/ITK,daviddoria/itkHoughTransform,hendradarwin/ITK,itkvideo/ITK,richardbeare/ITK,BRAINSia/ITK,biotrump/ITK,heimdali/ITK,ajjl/ITK,fbudin69500/ITK,thewtex/ITK,thewtex/ITK,PlutoniumHeart/ITK,heimdali/ITK,CapeDrew/DCMTK-ITK,rhgong/itk-with-dom,CapeDrew/DCMTK-ITK,fuentesdt/InsightToolkit-dev,LucHermitte/ITK,msmolens/ITK,fedral/ITK,LucasGandel/ITK,Kitware/ITK,PlutoniumHeart/ITK,eile/ITK,paulnovo/ITK,GEHC-Surgery/ITK,paulnovo/ITK,GEHC-Surgery/ITK,itkvideo/ITK,stnava/ITK,itkvideo/ITK,wkjeong/ITK,blowekamp/ITK,CapeDrew/DITK,zachary-williamson/ITK,PlutoniumHeart/ITK,fuentesdt/InsightToolkit-dev,InsightSoftwareConsortium/ITK,wkjeong/ITK,stnava/ITK,stnava/ITK,hendradarwin/ITK,itkvideo/ITK,thewtex/ITK,BRAINSia/ITK,BlueBrain/ITK,daviddoria/itkHoughTransform,eile/ITK,LucasGandel/ITK,msmolens/ITK,hendradarwin/ITK,paulnovo/ITK,zachary-williamson/ITK,hjmjohnson/ITK,BRAINSia/ITK,vfonov/ITK,paulnovo/ITK,cpatrick/ITK-RemoteIO,hendradarwin/ITK,biotrump/ITK,richardbeare/ITK,fedral/ITK,BRAINSia/ITK,paulnovo/ITK,hjmjohnson/ITK,jcfr/ITK,wkjeong/ITK,stnava/ITK,jcfr/ITK,itkvideo/ITK,BRAINSia/ITK,blowekamp/ITK,stnava/ITK,hjmjohnson/ITK,rhgong/itk-with-dom,InsightSoftwareConsortium/ITK,LucasGandel/ITK,eile/ITK,rhgong/itk-with-dom,blowekamp/ITK,PlutoniumHeart/ITK,paulnovo/ITK,thewtex/ITK,itkvideo/ITK,hinerm/ITK,malaterre/ITK,Kitware/ITK,vfonov/ITK,eile/ITK,hinerm/ITK,CapeDrew/DCMTK-ITK,biotrump/ITK,BlueBrain/ITK,LucHermitte/ITK,msmolens/ITK,atsnyder/ITK,GEHC-Surgery/ITK,Kitware/ITK,jcfr/ITK,atsnyder/ITK,blowekamp/ITK,spinicist/ITK,fedral/ITK,Kitware/ITK,CapeDrew/DITK,paulnovo/ITK,LucasGandel/ITK,LucasGandel/ITK,itkvideo/ITK,jmerkow/ITK,CapeDrew/DITK,Kitware/ITK,PlutoniumHeart/ITK,atsnyder/ITK,BlueBrain/ITK,malaterre/ITK,thewtex/ITK,wkjeong/ITK,LucHermitte/ITK,malaterre/ITK,CapeDrew/DITK,blowekamp/ITK,rhgong/itk-with-dom,atsnyder/ITK,spinicist/ITK,hinerm/ITK,ajjl/ITK,eile/ITK,zachary-williamson/ITK,CapeDrew/DCMTK-ITK,fuentesdt/InsightToolkit-dev,heimdali/ITK,fbudin69500/ITK,ajjl/ITK,eile/ITK,wkjeong/ITK,hjmjohnson/ITK