Fix failure on TestSQLRepositoryQuery.testEqualsTimeWithMilliseconds on mysql

java.lang.AssertionError: expected:<1> but was:<0>
	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.nuxeo.ecm.core.TestSQLRepositoryQuery.testEqualsTimeWithMilliseconds(TestSQLRepositoryQuery.java:2254)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)