Fix UT TestRenditionService with MariaDB

java.lang.AssertionError: expected=java.util.GregorianCalendar[time=1513664943000,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Etc/UTC",offset=0,dstSavings=0,useDaylight=false,transitions=0,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=2017,MONTH=11,WEEK_OF_YEAR=51,WEEK_OF_MONTH=4,DAY_OF_MONTH=19,DAY_OF_YEAR=353,DAY_OF_WEEK=3,DAY_OF_WEEK_IN_MONTH=3,AM_PM=0,HOUR=6,HOUR_OF_DAY=6,MINUTE=29,SECOND=3,MILLISECOND=0,ZONE_OFFSET=0,DST_OFFSET=0] is before actual=java.util.GregorianCalendar[time=1513664944000,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Etc/UTC",offset=0,dstSavings=0,useDaylight=false,transitions=0,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=2017,MONTH=11,WEEK_OF_YEAR=51,WEEK_OF_MONTH=4,DAY_OF_MONTH=19,DAY_OF_YEAR=353,DAY_OF_WEEK=3,DAY_OF_WEEK_IN_MONTH=3,AM_PM=0,HOUR=6,HOUR_OF_DAY=6,MINUTE=29,SECOND=4,MILLISECOND=0,ZONE_OFFSET=0,DST_OFFSET=0]
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at org.junit.Assert.assertFalse(Assert.java:64)
	at org.nuxeo.ecm.core.test.StorageConfiguration.lambda$assertNotBeforeTimestamp$1(StorageConfiguration.java:390)
	at org.nuxeo.ecm.core.test.StorageConfiguration.assertNotBeforeTimestamp(StorageConfiguration.java:392)
	at org.nuxeo.ecm.platform.rendition.service.TestRenditionService.shouldStoreLatestNonVersionedRendition(TestRenditionService.java:803)