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Support Backup of Snapshots for Managed Storage``` This PR adds an ability to Pass a new parameter, locationType, to the createSnapshot API command. Depending on the locationType, we decide where the snapshot should go in case of managed storage. There are two possible values for the locationType param 1) `Primary`: The standard operation for managed storage is to keep the snapshot on the device (primary). For non-managed storage, this will give an error as this option is only supported for managed storage 2) `Secondary`: Applicable only to managed storage. This will keep the snapshot on the secondary storage. For non-managed storage, this will result in an error. The reason for implementing this feature is to avoid a single point of failure for primary storage. Right now in case of managed storage, if the primary storage goes down, there is no easy way to recover data as all snapshots are also stored on the primary. This features allows us to mitigate that risk. ``` * pr/1600: Support Backup of Snapshots for Managed Storage Signed-off-by: Rajani Karuturi <rajani.karuturi@accelerite.com>