When performing a snapshot using the SMAPI, set is_a_snapshot
When performing a snapshot using the SMAPI, set is_a_snapshot

This is usually fixed up after the fact, either in xapi_vdi.ml
in the case of a normal VDI snapshot, or in update_snapshot_info_dest.
If the snapshot_of information is missing though, this does not
get set.

Signed-off-by: Jon Ludlam <e7e3380887a8f95cc9dc4f0d51dedc7e849a287a@citrix.com>

huizh/xen-api,euanh/xen-api,robertbreker/xen-api,koushikcgit/xen-api,cheng-z/xen-api,srowe/xen-api,thomassa/xen-api,koushikcgit/xen-api,salvocambria/xen-api,guard163/xen-api,thomassa/xen-api,huizh/xen-api,anoobs/xen-api,cheng-z/xen-api,salvocambria/xen-api,guard163/xen-api,vasilenkomike/xen-api,guard163/xen-api,jjd27/xen-api,jjd27/xen-api,anoobs/xen-api,cheng--zhang/xen-api,djs55/xen-api,anoobs/xen-api,huizh/xen-api,agimofcarmen/xen-api,robertbreker/xen-api,robertbreker/xen-api,salvocambria/xen-api,guard163/xen-api,euanh/xen-api,djs55/xen-api,anoobs/xen-api,jjd27/xen-api,rafalmiel/xen-api,thomassa/xen-api,thomassa/xen-api,cheng-z/xen-api,salvocambria/xen-api,agimofcarmen/xen-api,anoobs/xen-api,cheng--zhang/xen-api,koushikcgit/xen-api,cheng-z/xen-api,agimofcarmen/xen-api,euanh/xen-api,thomassa/xen-api,huizh/xen-api,djs55/xen-api,koushikcgit/xen-api,vasilenkomike/xen-api,srowe/xen-api,jjd27/xen-api,euanh/xen-api,rafalmiel/xen-api,salvocambria/xen-api,jjd27/xen-api,djs55/xen-api,jjd27/xen-api,cheng--zhang/xen-api,djs55/xen-api,agimofcarmen/xen-api,guard163/xen-api,simonjbeaumont/xen-api,Frezzle/xen-api,rafalmiel/xen-api,simonjbeaumont/xen-api,agimofcarmen/xen-api,Frezzle/xen-api,euanh/xen-api,simonjbeaumont/xen-api,cheng-z/xen-api,djs55/xen-api,guard163/xen-api,rafalmiel/xen-api,euanh/xen-api,robertbreker/xen-api,simonjbeaumont/xen-api,huizh/xen-api,koushikcgit/xen-api,vasilenkomike/xen-api,srowe/xen-api,rafalmiel/xen-api,anoobs/xen-api,simonjbeaumont/xen-api,koushikcgit/xen-api,cheng--zhang/xen-api,cheng--zhang/xen-api,robertbreker/xen-api,robertbreker/xen-api,simonjbeaumont/xen-api,srowe/xen-api,cheng-z/xen-api,cheng--zhang/xen-api,rafalmiel/xen-api,huizh/xen-api,thomassa/xen-api,agimofcarmen/xen-api,cheng-z/xen-api,vasilenkomike/xen-api,Frezzle/xen-api,vasilenkomike/xen-api,cheng--zhang/xen-api,srowe/xen-api,salvocambria/xen-api,Frezzle/xen-api,vasilenkomike/xen-api,Frezzle/xen-api