Disable union.test for marklogic_xml as it is disabled in master.
Disable union.test for marklogic_xml as it is disabled in master.

quasar-analytics/quasar,slamdata/slamengine,drostron/quasar,slamdata/quasar,jedesah/Quasar,quasar-analytics/quasar,slamdata/slamengine,drostron/quasar,quasar-analytics/quasar,drostron/quasar,quasar-analytics/quasar,jedesah/Quasar,drostron/quasar,slamdata/slamengine,jedesah/Quasar,djspiewak/quasar,jedesah/Quasar