revert change to JavaConverions (it is not compatible with 2.11)

Author: maiflai

src/main/groovy/org/scoverage/ScoverageReport.groovy

@@ -6,7 +6,7 @@ import org.gradle.api.tasks.CacheableTask
 import org.gradle.api.tasks.Input
 import org.gradle.api.tasks.OutputDirectory
 import org.gradle.api.tasks.TaskAction
-import scala.collection.JavaConverters
+import scala.collection.JavaConversions
 import scala.collection.Seq
 import scala.collection.Set
 import scoverage.Coverage
@@ -47,7 +47,7 @@ class ScoverageReport extends DefaultTask {
                 project.logger.info("[scoverage] Could not find coverage file, skipping...")
             } else {
                 File[] array = IOUtils.findMeasurementFiles(dataDir.get())
-                Seq<File> measurementFiles = JavaConverters.asScalaBuffer(Arrays.asList(array))
+                Seq<File> measurementFiles = JavaConversions.asScalaBuffer(Arrays.asList(array))
 
                 Coverage coverage = Serializer.deserialize(coverageFile)