libqa: construct a different execLine when new user's default session is not specified
libqa: construct a different execLine when new user's default session is not specified

chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,vrutkovs/vrutkovs.github.io,chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,chergert/gnome-continuous