SQL Auditing fixes

- Blob auditing storage account key must be set from secondary storage account key when StorageKeyType 'Secondary' is provided.

- Fixes for issue:
#5046

Author: ranisha2

src/ResourceManager/Sql/Commands.Sql/Auditing/Services/SqlAuditAdapter.cs

@@ -470,7 +470,7 @@ private BlobAuditingCreateOrUpdateParameters PolicizeBlobAuditingModel(BaseBlobA
             if (!IgnoreStorage && (model.AuditState == AuditStateType.Enabled))
             {
                 properties.StorageEndpoint = ExtractStorageAccountName(model, storageEndpointSuffix);
-                properties.StorageAccountAccessKey = ExtractStorageAccountKey(model.StorageAccountName);
+                properties.StorageAccountAccessKey = ExtractStorageAccountKey(model.StorageAccountName, model.StorageKeyType);
                 properties.IsStorageSecondaryKeyInUse = model.StorageKeyType == StorageKeyKind.Secondary;
                 properties.StorageAccountSubscriptionId = ExtractStorageAccountSubscriptionId(model.StorageAccountName);
             }
@@ -485,7 +485,7 @@ private BlobAuditingCreateOrUpdateParameters PolicizeBlobAuditingModel(BaseBlobA
 
         private static IList<string> ExtractAuditActionsAndGroups(BaseBlobAuditingPolicyModel model)
         {
-            var dbPolicyModel = model as DatabaseBlobAuditingPolicyModel;
+            var dbPolicyModel = model as DatabaseBlobAuditingSettingsModel;
             var actionsAndGroups = new List<string>();
             if (dbPolicyModel != null)
             {
@@ -635,9 +635,9 @@ private string ExtractStorageAccountKey(string storageName, BaseTableAuditingPol
         /// <summary>
         /// Extracts the storage account requested key
         /// </summary>
-        private string ExtractStorageAccountKey(string storageName)
+        private string ExtractStorageAccountKey(string storageName, StorageKeyKind storageKeyKind)
         {
-                return AzureCommunicator.GetStorageKeys(storageName)[StorageKeyKind.Primary];
+                return AzureCommunicator.GetStorageKeys(storageName)[storageKeyKind];
         }
 
         internal void ClearStorageDetailsCache()