Fixed App Engine's SDK version to 1.9.25.
Fixed App Engine's SDK version to 1.9.25.

ciandt-dev/tech-gallery,sidharta/sales-gallery,tuliobraga/tech-gallery,ciandt-dev/tech-gallery,sidharta/sales-gallery,tuliobraga/tech-gallery,ciandt-dev/tech-gallery,sidharta/sales-gallery,tuliobraga/tech-gallery