Updating the ADLS SDK connector to use the current version of the ADLS SDK (2.2.7).
Changelist is here: https://github.com/Azure/azure-data-lake-store-java/blob/sdk2.2/CHANGES.md
Short summary of what matters:
Change to the MSI token acquisition interface required by the change in REST interface to Azure ActiveDirecotry's VM MSI interface, and improved diagnostics in the SDK for token acquisition failures (better exception message and log message). The diagnostics was requested in HADOOP-15188.