DURABLE_REDUCED_AVAILABILITY support missing #1833
Description
DURABLE_REDUCED_AVAILABILITY is a legitimate (though discouraged) value for StorageClass.
The current enum in google-cloud-java does not include a value for DURABLE_REDUCED_AVAILABILITY so we crash when the server's reply contains this value.
We should add the value to the enum.
See this bug report for an example of someone running into this problem.