[beeswax] Close HiveServer2 and Impala session command

  e.g. Close all HiveServer2 sessions created by Hue
  build/env/bin/hue close_sessions 0 hive

  e.g. Close all HiveServer2 and Impala created by Hue at least one week ago
  build/env/bin/hue close_sessions 7 all