There are various tests in RestPutOperationTest that are failing verify builds at least half the time. A couple examples:

java.lang.AssertionError: expected:<200> but was:<400>
at org.junit.Assert.fail(Assert.java:88)
at org.junit.Assert.failNotEquals(Assert.java:743)
at org.junit.Assert.assertEquals(Assert.java:118)
at org.junit.Assert.assertEquals(Assert.java:555)
at org.junit.Assert.assertEquals(Assert.java:542)
at org.opendaylight.controller.sal.restconf.impl.test.RestPutOperationTest.putConfigStatusCodes(RestPutOperationTest.java:103)

RestPutOperationTest.putWithOptimisticLockFailedException:177 expected:<200> but was:<400>

RestPutOperationTest.putDataMountPointIntoHighestElement:159 expected:<200> but was:<400>

It seems there's an issue with incorrect status codes.