Make all templates consistent

[sayedihashimi]

See https://github.com/dotnet/dotnet-template-samples/pull/20#issuecomment-330354670

We should update the templates to use the same naming patterns.

[guardrex]

Cross-ref for the topic repo work that goes along with this: https://github.com/dotnet/docs/issues/3175

[guardrex]

@sayedihashimi I'm asking [@]mairaw if she'll let me take care of the topic. If she says :+1:, I'll need to know what name you (or your assignee here) would like to use.

• Is there anything else outside of the identity and shortname to change?
• What values would you like to use for identity and shortname?

I'll track this and be on stand-by until more is known.

[neman]

I agree that we should define values for shared (common) variables used across project examples. I looked a little bit more, and found that there are inconsistencies even among first 15 examples. I will post a detailed info soon.

[sayedihashimi]

Thanks @neman