#483 Fixed typo in mlUnitTest task description

Also improved how existing results directory is deleted

Author: rjrudin

src/main/groovy/com/marklogic/gradle/MarkLogicPlugin.groovy

@@ -312,7 +312,7 @@ class MarkLogicPlugin implements Plugin<Project> {
 				"Can use -PsuiteName to override the name of the test suite, and -PtestName to override the name of the test module.")
 		project.task("mlUnitTest", type: UnitTestTask, group: unitTestGroup, description: "Run tests found under /test/suites in the modules database. " +
 			"Connects to MarkLogic via the REST API server defined by mlTestRestPort (or by mlRestPort if mlTestRestPort is not set), and uses mlRest* properties for authentication. " +
-			"Use -PunitTestResultPath to override where test result files are written, which defaults to build/test-results/marklogic-unit-test. " +
+			"Use -PunitTestResultsPath to override where test result files are written, which defaults to build/test-results/marklogic-unit-test. " +
 			"Use -PrunCodeCoverage to enable code coverage support when running the tests. " + 
 			"Use -PrunTeardown and -PrunSuiteTeardown to control whether teardown and suite teardown scripts are run; these default to 'true' and can be set to 'false' instead. ")
 

src/main/groovy/com/marklogic/gradle/task/test/UnitTestTask.groovy

@@ -5,6 +5,7 @@ import com.marklogic.gradle.task.MarkLogicTask
 import com.marklogic.test.unit.DefaultJUnitTestReporter
 import com.marklogic.test.unit.JUnitTestSuite
 import com.marklogic.test.unit.TestManager
+import org.apache.commons.io.FileUtils
 import org.gradle.api.GradleException
 import org.gradle.api.tasks.TaskAction
 
@@ -73,9 +74,11 @@ class UnitTestTask extends MarkLogicTask {
 
 			File resultsDir = new File(resultsPath)
 			if (resultsDir.exists()) {
-				boolean deleted = resultsDir.deleteDir()
-				if (!deleted) {
-					println "Unable to delete test results directory: " + resultsPath
+				try {
+					FileUtils.cleanDirectory(resultsDir)
+					println "Deleted existing results directory: " + resultsDir
+				} catch (Exception e) {
+					println "Unable to delete test results directory: " + resultsDir
 				}
 			}
 			resultsDir.mkdirs()