core: Wait a bit longer after HTTP post
core: Wait a bit longer after HTTP post

On a loaded device we might run into a timeout unnecessarily.

Improves situation with CTT requirement 7.3.136.1 and 7.3.136.4.

Pelagicore/Media-Manager-Rygel-patched,Pelagicore/Media-Manager-Rygel-patched,jku/rygel,Pelagicore/Media-Manager-Rygel-patched,jku/rygel,Tarnyko/rygel,GNOME/rygel,GNOME/rygel,GNOME/rygel,Tarnyko/rygel