CA-177415: update VDI.name_label and name_description on changes
CA-177415: update VDI.name_label and name_description on changes

We already call the storage implementation to set the name label and
name description. We have to call VDI.update -> SMAPIv2 VDI.stat ->
SMAPIv3 Volume.stat to find out the value that 'stuck' (which may have
been truncated for example) and to update the xapi db accordingly.

Signed-off-by: David Scott <63c9eb0ea83039690fefa11afe17873ba8278a56@eu.citrix.com>

Frezzle/xen-api,salvocambria/xen-api,djs55/xen-api,simonjbeaumont/xen-api,thomassa/xen-api,simonjbeaumont/xen-api,rafalmiel/xen-api,rafalmiel/xen-api,jjd27/xen-api,thomassa/xen-api,rafalmiel/xen-api,guard163/xen-api,agimofcarmen/xen-api,Frezzle/xen-api,rafalmiel/xen-api,robertbreker/xen-api,srowe/xen-api,Frezzle/xen-api,vasilenkomike/xen-api,jjd27/xen-api,vasilenkomike/xen-api,euanh/xen-api,agimofcarmen/xen-api,thomassa/xen-api,srowe/xen-api,euanh/xen-api,salvocambria/xen-api,srowe/xen-api,jjd27/xen-api,robertbreker/xen-api,guard163/xen-api,salvocambria/xen-api,euanh/xen-api,anoobs/xen-api,salvocambria/xen-api,simonjbeaumont/xen-api,euanh/xen-api,agimofcarmen/xen-api,srowe/xen-api,guard163/xen-api,rafalmiel/xen-api,vasilenkomike/xen-api,anoobs/xen-api,robertbreker/xen-api,agimofcarmen/xen-api,thomassa/xen-api,anoobs/xen-api,agimofcarmen/xen-api,jjd27/xen-api,djs55/xen-api,robertbreker/xen-api,salvocambria/xen-api,jjd27/xen-api,simonjbeaumont/xen-api,anoobs/xen-api,Frezzle/xen-api,thomassa/xen-api,euanh/xen-api,simonjbeaumont/xen-api,djs55/xen-api,anoobs/xen-api,guard163/xen-api,guard163/xen-api,anoobs/xen-api,euanh/xen-api,rafalmiel/xen-api,thomassa/xen-api,robertbreker/xen-api,agimofcarmen/xen-api,salvocambria/xen-api,vasilenkomike/xen-api,guard163/xen-api,srowe/xen-api,jjd27/xen-api,simonjbeaumont/xen-api,robertbreker/xen-api,vasilenkomike/xen-api,Frezzle/xen-api,vasilenkomike/xen-api,djs55/xen-api,djs55/xen-api,djs55/xen-api