Jira WDT-250 fix the decrypted password to work properly with wlst setter

Author: CarolynRountree

core/src/main/python/wlsdeploy/aliases/aliases.py

@@ -1154,6 +1154,8 @@ def __decrypt_password(self, text):
         else:
             passphrase = self._model_context.get_encryption_passphrase()
             rtnval = EncryptionUtils.decryptString(text, String(passphrase).toCharArray())
+            if rtnval:
+                rtnval = String.valueOf(rtnval)
 
         return rtnval