tests: Add a bunch of new tests to virsh-optparse
tests: Add a bunch of new tests to virsh-optparse

The new tests deal with numeric options of three kinds: regular,
scaled and timeouts. For each, both valid and invalid inputs
are provided, hopefully covering all cases: this should allow us
to avoid regressions when changing the relevant code in virsh.

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