Attempt to send element from a nonexistent namespace into the
configuration will cause NullPointerException. This was
reported as bug 5125. Make sure this bug does not return back
by adding a test against it.
Change-Id: I7754c2a30c5d8940a9c4f554d64111ead1d1a96b Signed-off-by: Jozef Behran <jbehran@cisco.com>