5 tests in JSF component failed with the same error in tearDown() method:

>>> org.jboss.tools.jsf.test.JsfAllTests.junit.framework.TestSuite@a6aae0 1.235 1
>>> org.jboss.tools.jsf.text.ext.test.JsfTextExtAllTests.org.jboss.tools.jsf.text.ext.test.JSF2CSSStylesheetOpenOnTest 2.778 1
>>> org.jboss.tools.jsf.text.ext.test.JsfTextExtAllTests.org.jboss.tools.jsf.text.ext.test.JSF2CCAttrsOpenOnTest 0.612 1
>>> org.jboss.tools.jsf.test.JsfAllTests.org.jboss.tools.jsf.model.pv.test.JsfJbide7975Test 2.943 2
>>> org.jboss.tools.jsf.text.ext.test.JsfTextExtAllTests.org.jboss.tools.jsf.text.ext.test.JSF2MessagesOpenOnTest 3.496 2

Error Message

Problems encountered while deleting resources.

Stacktrace

org.eclipse.core.internal.resources.ResourceException: Problems encountered while deleting resources.
at org.eclipse.core.internal.resources.Resource.delete(Resource.java:800)
at org.eclipse.core.internal.resources.Project.delete(Project.java:344)
at org.jboss.tools.test.util.ResourcesUtils.deleteProject(ResourcesUtils.java:206)
at org.jboss.tools.test.util.ProjectImportTestSetup.tearDown(ProjectImportTestSetup.java:85)
at junit.extensions.TestSetup$1.protect(TestSetup.java:24)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.extensions.TestSetup.run(TestSetup.java:27)
at junit.framework.TestSuite.runTest(TestSuite.java:232)
at junit.framework.TestSuite.run(TestSuite.java:227)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
at junit.extensions.TestSetup$1.protect(TestSetup.java:23)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.extensions.TestSetup.run(TestSetup.java:27)
at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140)