printing: Don't leak http connection to CUPS
printing: Don't leak http connection to CUPS

Close http connection to CUPS after execution
of request which created it.

https://bugzilla.gnome.org/show_bug.cgi?id=720535

alexlarsson/gtk,ahodesuka/gtk,jigpu/gtk,jessevdk/gtk,Lyude/gtk-,Sidnioulz/SandboxGtk,jigpu/gtk,Sidnioulz/SandboxGtk,jadahl/gtk,grubersjoe/adwaita,chergert/gtk,jessevdk/gtk,Adamovskiy/gtk,chergert/gtk,jadahl/gtk,davidgumberg/gtk,Lyude/gtk-,alexlarsson/gtk,grubersjoe/adwaita,grubersjoe/adwaita,alexlarsson/gtk,alexlarsson/gtk,jadahl/gtk,davidgumberg/gtk,Adamovskiy/gtk,davidgumberg/gtk,davidgumberg/gtk,jigpu/gtk,msteinert/gtk,davidgumberg/gtk,Adamovskiy/gtk,chergert/gtk,chergert/gtk,chergert/gtk,grubersjoe/adwaita,Sidnioulz/SandboxGtk,jigpu/gtk,ahodesuka/gtk,jessevdk/gtk,Lyude/gtk-,chergert/gtk,jadahl/gtk,Sidnioulz/SandboxGtk,grubersjoe/adwaita,alexlarsson/gtk,chergert/gtk,grubersjoe/adwaita,alexlarsson/gtk,jessevdk/gtk,Lyude/gtk-,Adamovskiy/gtk,msteinert/gtk,ahodesuka/gtk,jigpu/gtk,chergert/gtk,Sidnioulz/SandboxGtk,msteinert/gtk,Adamovskiy/gtk,jadahl/gtk,Lyude/gtk-,ahodesuka/gtk,jadahl/gtk,jigpu/gtk,davidgumberg/gtk,davidgumberg/gtk,ahodesuka/gtk,Sidnioulz/SandboxGtk,ahodesuka/gtk,Adamovskiy/gtk,jadahl/gtk,alexlarsson/gtk,alexlarsson/gtk,ahodesuka/gtk,jessevdk/gtk,jigpu/gtk,msteinert/gtk,Lyude/gtk-,Adamovskiy/gtk,Lyude/gtk-,grubersjoe/adwaita,Adamovskiy/gtk,msteinert/gtk,grubersjoe/adwaita,jadahl/gtk,Lyude/gtk-,jessevdk/gtk,jigpu/gtk,davidgumberg/gtk,jessevdk/gtk,msteinert/gtk,ahodesuka/gtk