LPS-50345 prevent extraneous error messages by not attempting to encrypt...

... a null password.

format-source:
     [copy] Copying 3 files to d:\repo\portal\portal-impl\classes
     [java] Loading file:/D:/repo/portal/portal-impl/classes/system.properties
     [java] missing language key: from-id portal-web/docroot/html/portlet/unit_converter/view.jsp
     [java] missing language key: to-id portal-web/docroot/html/portlet/unit_converter/view.jsp
     [java] Loading file:/D:/repo/portal/portal-impl/classes/portal.properties

BUILD SUCCESSFUL
Total time: 1 minute 3 seconds