Add Azure identity sample for Event Hubs README (#4188)
Add Azure identity sample for Event Hubs README (#4188)

* Adding an example to authorize with AAD.

* Fix broken links

* Fixing link.

* Sort links

* Make links relative

* Review changes.

selvasingh/azure-sdk-for-java,navalev/azure-sdk-for-java,navalev/azure-sdk-for-java,Azure/azure-sdk-for-java,selvasingh/azure-sdk-for-java,Azure/azure-sdk-for-java,navalev/azure-sdk-for-java,Azure/azure-sdk-for-java,Azure/azure-sdk-for-java,navalev/azure-sdk-for-java,navalev/azure-sdk-for-java,Azure/azure-sdk-for-java,selvasingh/azure-sdk-for-java