TST: fix vmImage dispatch in Azure
TST: fix vmImage dispatch in Azure

charris/numpy,mattip/numpy,jorisvandenbossche/numpy,madphysicist/numpy,pdebuyl/numpy,abalkin/numpy,mattip/numpy,WarrenWeckesser/numpy,shoyer/numpy,jakirkham/numpy,anntzer/numpy,WarrenWeckesser/numpy,WarrenWeckesser/numpy,WarrenWeckesser/numpy,madphysicist/numpy,endolith/numpy,pizzathief/numpy,madphysicist/numpy,shoyer/numpy,pdebuyl/numpy,jorisvandenbossche/numpy,mhvk/numpy,ahaldane/numpy,grlee77/numpy,mattip/numpy,endolith/numpy,simongibbons/numpy,jakirkham/numpy,pdebuyl/numpy,grlee77/numpy,rgommers/numpy,simongibbons/numpy,ahaldane/numpy,seberg/numpy,charris/numpy,pbrod/numpy,pizzathief/numpy,rgommers/numpy,pbrod/numpy,jorisvandenbossche/numpy,abalkin/numpy,seberg/numpy,shoyer/numpy,rgommers/numpy,grlee77/numpy,shoyer/numpy,MSeifert04/numpy,pdebuyl/numpy,ahaldane/numpy,numpy/numpy,jorisvandenbossche/numpy,charris/numpy,grlee77/numpy,MSeifert04/numpy,jakirkham/numpy,pizzathief/numpy,endolith/numpy,pbrod/numpy,numpy/numpy,simongibbons/numpy,shoyer/numpy,madphysicist/numpy,MSeifert04/numpy,numpy/numpy,jakirkham/numpy,charris/numpy,ahaldane/numpy,rgommers/numpy,simongibbons/numpy,anntzer/numpy,jorisvandenbossche/numpy,MSeifert04/numpy,numpy/numpy,mhvk/numpy,mhvk/numpy,grlee77/numpy,seberg/numpy,seberg/numpy,endolith/numpy,mhvk/numpy,pbrod/numpy,anntzer/numpy,WarrenWeckesser/numpy,madphysicist/numpy,MSeifert04/numpy,anntzer/numpy,abalkin/numpy,mattip/numpy,jakirkham/numpy,pizzathief/numpy,pbrod/numpy,pizzathief/numpy,ahaldane/numpy,mhvk/numpy,simongibbons/numpy