JMXInvokerTestCase and secureJMXInvokerTestCase fails on all Windows platform

Failure of following testcases on Windows platform:

1) org.jboss.test.deployment.JBPAPP6716UnitTestCase

Stacktrace:

junit.framework.AssertionFailedError: Failed to remove: W:\workspace\eap5-as-win64-sun6\jboss-eap-5.1\jboss-as\server\all\deploy\dummy.war test deployment from: W:\workspace\eap5-as-win64-sun6\jboss-eap-5.1\jboss-as\server\all\deploy
at org.jboss.test.deployment.JBPAPP6716UnitTestCase.testDeploymentsInDeployDirectory(JBPAPP6716UnitTestCase.java:276)

2) org.jboss.test.jmx.test.JMXInvokerUnitTestCase
3) org.jboss.test.jmx.test.SecureJMXInvokerUnitTestCase

Stacktrace:

javax.management.InstanceNotFoundException: jboss.test:service=InvokerTest,secured=true is not registered.
at org.jboss.mx.server.registry.BasicMBeanRegistry.get(BasicMBeanRegistry.java:526)
at org.jboss.mx.server.MBeanServerImpl.getAttribute(MBeanServerImpl.java:559)
at org.jboss.jmx.connector.invoker.InvokerAdaptorService.invoke(InvokerAdaptorService.java:266)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:157)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:138)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:90)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:140)
at org.jboss.jmx.connector.invoker.SerializableInterceptor.invoke(SerializableInterceptor.java:74)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:90)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668)

These tests seem to fail due to java.lang.IllegalStateException: jboss.web.deployment:war=/dummy is already installed.
OR javax.management.InstanceAlreadyExistsException: jboss.management.local:j2eeType=WebModule,J2EEServer=Local,J2EEApplication=null,name=dummy.war already registered.
Attaching detailed output log from server .