Changed server.mappath to use hostingenvironment instead.
Changed server.mappath to use hostingenvironment instead.

KuduApps/NugetGallery21Fx45-DeleteMe,KuduApps/NugetGallery16Fx45-DeleteMe,kudustress/NuGetGallery,kudustress/NuGetGallery2,JetBrains/ReSharperGallery,skbkontur/NuGetGallery,ScottShingler/NuGetGallery,grenade/NuGetGallery_download-count-patch,KuduApps/NuGetGallery,skbkontur/NuGetGallery,KuduApps/NuGetGallery,JetBrains/ReSharperGallery,projectkudu/SiteExtensionGallery,KuduApps/NugetGallery16Fx45-DeleteMe,projectkudu/SiteExtensionGallery,skbkontur/NuGetGallery,KuduApps/NugetGallery21Fx45-DeleteMe,kudustress/NuGetGallery2,projectkudu/SiteExtensionGallery,KuduApps/NuGetGallery,KuduApps/NuGetGallery,kudustress/NuGetGallery,KuduApps/NuGetGallery,mtian/SiteExtensionGallery,ScottShingler/NuGetGallery,mtian/SiteExtensionGallery,JetBrains/ReSharperGallery,kudustress/NuGetGalleryOptmized,kudustress/NuGetGalleryOptmized,ScottShingler/NuGetGallery,grenade/NuGetGallery_download-count-patch,mtian/SiteExtensionGallery,grenade/NuGetGallery_download-count-patch