[Desktop] Updated offline samples to match store versions
- ExportTileCache - fixed spatial reference issue
- GenerateGeodatabase - changed to more stable online services
[Store] Added offline samples to match desktop
- ExportTileCache
- GenerateGeodatabase
- SyncGeodatabase
- OfflineGeocoding
- OfflineRouting
Merge pull request #8 from Esri/vnext/offline_samples

Vnext/offline samples