Fix Connect Report unit test

java.lang.IllegalArgumentException: Operation dumpAllThreads on MBean java.lang:type=Threading is overloaded. Signatures found: (boolean,boolean,int),(boolean,boolean). Use a signature when specifying the operation.
	at org.jolokia.handler.ExecHandler.extractOperationTypes(ExecHandler.java:138)
	at org.jolokia.handler.ExecHandler.doHandleRequest(ExecHandler.java:84)
	at org.jolokia.handler.ExecHandler.doHandleRequest(ExecHandler.java:40)
	at org.jolokia.handler.JsonRequestHandler.handleRequest(JsonRequestHandler.java:89)
	at org.jolokia.backend.MBeanServerExecutorLocal.handleRequest(MBeanServerExecutorLocal.java:109)
	at org.jolokia.backend.MBeanServerHandler.dispatchRequest(MBeanServerHandler.java:159)
	at org.jolokia.backend.LocalRequestDispatcher.dispatchRequest(LocalRequestDispatcher.java:99)
	at org.jolokia.backend.BackendManager.callRequestDispatcher(BackendManager.java:413)
	at org.jolokia.backend.BackendManager.handleRequest(BackendManager.java:158)
	at org.nuxeo.connect.tools.report.management.MXComponent$RequestBuilder.run(MXComponent.java:106)
	at org.nuxeo.connect.tools.report.management.MxThreadDumpReport.write(MxThreadDumpReport.java:33)
	at org.nuxeo.connect.tools.report.ICanReportTest$When.i_run_the_report(ICanReportTest.java:194)
	at org.nuxeo.connect.tools.report.ICanReportTest$When$ByteBuddy$NijDLKwx.i_run_the_report$accessor$Z88RFlEx(Unknown Source)
	at org.nuxeo.connect.tools.report.ICanReportTest$When$ByteBuddy$NijDLKwx$auxiliary$2WnAjFrX.call(Unknown Source)