Incorrect time unit written out to JCA configuration

<keepalive-time time="10" unit="SECONDS"/>

testStandalonePreview(org.jboss.as.test.flat.xml.StandardConfigsXMLValidationUnitTestCase): cvc-enumeration-valid: Value 'SECONDS' is not facet-valid with respect to enumeration '[s, sec, seconds, m, min, minutes, ms, milliseconds, ns, nanoseconds, h, hours, d, days, w, weeks, mon, months]'. It must be a value from the enumeration.