If encryption is already initialized we don't need to do it again.

utils/src/com/cloud/utils/crypt/EncryptionSecretKeyChecker.java

@@ -72,6 +72,11 @@ public class EncryptionSecretKeyChecker extends AdapterBase implements SystemInt
                 return;
             }
             
+            if (s_useEncryption) {
+            	s_logger.warn("Encryption already enabled, is check() called twice?");
+            	return;
+            }
+
             s_encryptor.setAlgorithm("PBEWithMD5AndDES");
             String secretKey = null;