ENH: ExternalData: Consolidate download_object result reporting
ENH: ExternalData: Consolidate download_object result reporting

Add object download result reporting into private download_object
function and remove it from the call site.  This will allow additional
logic that involves the internal variables of the function.

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