Adapt augeas profile to handle negative int values.
Adapt augeas profile to handle negative int values.

Introducing keepalive_interval = -1 breaks to augeas lens. Fix the lens
by allowing signed ints in the regular expression.

eskultety/libvirt,datto/libvirt,datto/libvirt,taget/libvirt,libvirt/libvirt,eskultety/libvirt,taget/libvirt,andreabolognani/libvirt,jfehlig/libvirt,libvirt/libvirt,nertpinx/libvirt,crobinso/libvirt,olafhering/libvirt,andreabolognani/libvirt,jardasgit/libvirt,crobinso/libvirt,andreabolognani/libvirt,nertpinx/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,olafhering/libvirt,datto/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,zippy2/libvirt,zippy2/libvirt,taget/libvirt,zippy2/libvirt,nertpinx/libvirt,taget/libvirt,andreabolognani/libvirt,crobinso/libvirt,jardasgit/libvirt,libvirt/libvirt,datto/libvirt,eskultety/libvirt,datto/libvirt,nertpinx/libvirt,olafhering/libvirt,eskultety/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,jardasgit/libvirt,jfehlig/libvirt,olafhering/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,eskultety/libvirt,crobinso/libvirt,libvirt/libvirt,VenkatDatta/libvirt,taget/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,zippy2/libvirt