Critical Description
This jar is required for secure access to Azure object storage: https://hadoop.apache.org/docs/current/hadoop-azure-datalake/index.html
There is already an azure profile in Tez but it doesn't include this jar.
Since the jar is only supported on Hadoop 2.8+, will either need to:
1. Determine that including it in a 2.7 build is fine
2. Or if it is not fine, then include the jar only when both the 2.8 profile and the azure profile are activated