I still prefer my case descripton:
"Test checks that Savanna can create templates."
It has the same style as other case descriptions in Sanity Tests

I will change 'flavor' to 'Nova flavor'. My understanding is that it is a widely used term in OpenStack, isn't it?

"node group template" is a type, os the phrase "List current node group templates." is correct as a whole.

All other changes are incorporated.