Updated mojo for new deserialization

Author: sksamuel

src/main/scala/org/scoverage/maven/ReportMojo.scala

@@ -28,7 +28,8 @@ class ReportMojo extends AbstractMojo {
  def execute() {
 
  val coverageFilesDirName = project.getProperties.getProperty(ReportMojo.COVERAGE_DATA_DIR_PROP, project.getBuild.getOutputDirectory)
- val coverage = IOUtils.deserialize(getClass.getClassLoader, IOUtils.coverageFile(coverageFilesDirName))
+ val coverageFile = IOUtils.coverageFile(coverageFilesDirName)
+ val coverage = IOUtils.deserialize(coverageFile)
  val measurementFiles = IOUtils.findMeasurementFiles(coverageFilesDirName)
  val measurements = IOUtils.invoked(measurementFiles)
  coverage.apply(measurements)