aligning AutoExportBlobRetention documentation and script to AutoExport script

Author: Cameron Battagler

samples/manage/azure-automation-automated-export/AutoExportBlobRetention.ps1

@@ -1,14 +1,21 @@
-# The storage key for the storage account you are using.
-$storageKey = Get-AutomationVariable -Name "STORAGEKEYVARIABLENAME";
-# The name of the storage container you are using.
-$storageContainer = "STORAGECONTAINERNAME";
-# Set up the storage context for the storage account.
-$context = New-AzureStorageContext -StorageAccountName "STORAGEACCOUNTNAME" -StorageAccountKey $storageKey
-# Get all of the blobs in the storage account.
-$blobs = Get-AzureStorageBlob -Container $storageContainer -Context $context
+#Azure Automation String Variable name for your Storage Account Key
+$storageKeyVariableName = "STORAGEKEYVARIABLENAME";
+#Name of your Storage Account
+$storageAccountName = "STORAGEACCOUNTNAME";
+#Name of your Storage Container
+$storageContainerName = "STORAGECONTAINERNAME";
 # Set the number of days that you want the blob to be stored for.
 $retentionInDays = 30
 
+
+# Get the storage key
+$storageKey = Get-AutomationVariable -Name $storageKeyVariableName;
+# Set up the storage context for the storage account.
+$context = New-AzureStorageContext -StorageAccountName $storageAccountName -StorageAccountKey $storageKey
+# Get all of the blobs in the storage account.
+$blobs = Get-AzureStorageBlob -Container $storageContainerName -Context $context
+
+
 foreach($blob in $blobs)
 {
     # Get the current time to compare to the time that the blob was created.