Update to Logstash Logger 0.15.2
Update to Logstash Logger 0.15.2

oskarpearson/e-petitions,alphagov/e-petitions,unboxed/e-petitions,StatesOfJersey/e-petitions,joelanman/e-petitions,unboxed/e-petitions,joelanman/e-petitions,unboxed/e-petitions,unboxed/e-petitions,StatesOfJersey/e-petitions,joelanman/e-petitions,oskarpearson/e-petitions,alphagov/e-petitions,StatesOfJersey/e-petitions,oskarpearson/e-petitions,StatesOfJersey/e-petitions,alphagov/e-petitions,alphagov/e-petitions