NOJIRA-separate-MyActivities-classes-from-module

In MyActivities, changed module::class to module;class so that the
class really has the parent MyActivities

  MyActivities::DashboardSites
  MyActivities::NotificationActivities
  MyActivities::RegBlocks
  MyActivities::SakaiAnnouncements

See: http://blog.elpassion.com/ruby-gotchas/
Merge pull request #2455 from chikoon/NOJIRA-separate-MyActivities-classes-from-module

NOJIRA-separate-MyActivities-classes-from-module