Page should have example queries

There are common things people need to do with the AZ Ad cli, this would be a good place to have some of those.

For instance, when people make a new service principal, they often need to get back the tenant id, etc. Here's the command they should run.

```
az ad sp create-for-rbac -n "" --query "{ clientid: appId, clientsecret: password, tenantid: tenant }"
```

Examples of common commands like this belong ont this page and would make it even better.
[Enter feedback here]

---
#### Document Details

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* ID: e99d25ff-03e2-e015-37f4-a29b59ec50d4
* Version Independent ID: 1a8e88ed-72c7-fbe7-b0ad-68f23b3946cd
* Content: [az ad sp](https://docs.microsoft.com/en-us/cli/azure/ad/sp?view=azure-cli-latest)
* Content Source: [latest/docs-ref-autogen/ad/sp.yml](https://github.com/MicrosoftDocs/azure-docs-cli/blob/master/latest/docs-ref-autogen/ad/sp.yml)
* Service: **active-directory**
* GitHub Login: @rloutlaw
* Microsoft Alias: **routlaw**