TerritoriesTestIT fails with plugin sds

[GerdP]

https://josm.openstreetmap.de/jenkins/job/JOSM-Integration/4749/jdk=JDK8/testReport/junit/org.openstreetmap.josm.tools/TerritoriesTestIT/testUtilityClass/

java.awt.HeadlessException
	at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:204)
	at java.awt.Window.<init>(Window.java:536)
	at java.awt.Frame.<init>(Frame.java:420)
	at java.awt.Frame.<init>(Frame.java:385)
	at javax.swing.SwingUtilities$SharedOwnerFrame.<init>(SwingUtilities.java:1763)
	at javax.swing.SwingUtilities.getSharedOwnerFrame(SwingUtilities.java:1838)
	at javax.swing.JDialog.<init>(JDialog.java:272)
	at javax.swing.JDialog.<init>(JDialog.java:206)
	at javax.swing.JDialog.<init>(JDialog.java:154)
	at org.openstreetmap.josm.gui.io.CredentialDialog.<init>(CredentialDialog.java:145)
	at org.openstreetmap.hot.sds.SdsCredentialDialog.<init>(SdsCredentialDialog.java:24)
	at org.openstreetmap.hot.sds.SdsCredentialDialog.getSdsApiCredentialDialog(SdsCredentialDialog.java:15)
	at org.openstreetmap.hot.sds.SdsCredentialAgent.getCredentials(SdsCredentialAgent.java:164)
	at org.openstreetmap.hot.sds.SdsConnection.addBasicAuthorizationHeader(SdsConnection.java:67)
	at org.openstreetmap.hot.sds.SdsConnection.addAuth(SdsConnection.java:86)
	at org.openstreetmap.hot.sds.SdsApi.sendRequest(SdsApi.java:345)
	at org.openstreetmap.hot.sds.SdsApi.sendRequest(SdsApi.java:301)
	at org.openstreetmap.hot.sds.SdsApi.requestShadowsFromSds(SdsApi.java:265)
	at org.openstreetmap.hot.sds.ReadPostprocessor.postprocessDataSet(ReadPostprocessor.java:70)
	at org.openstreetmap.josm.io.AbstractReader.callPostProcessors(AbstractReader.java:126)
	at org.openstreetmap.josm.io.AbstractReader.doParseDataSet(AbstractReader.java:316)
	at org.openstreetmap.josm.io.OsmReader.doParseDataSet(OsmReader.java:466)
	at org.openstreetmap.josm.io.OsmReader.parseDataSet(OsmReader.java:516)
	at org.openstreetmap.josm.io.OsmReader.parseDataSet(OsmReader.java:499)
	at org.openstreetmap.josm.tools.Territories.initializeInternalData(Territories.java:137)
	at org.openstreetmap.josm.tools.Territories.initialize(Territories.java:123)
	at org.openstreetmap.josm.tools.TerritoriesTestIT.testUtilityClass(TerritoriesTestIT.java:34)
	at org.openstreetmap.josm.testutils.JOSMTestRules$TimeoutThread.run(JOSMTestRules.java:731)