CA-177424: SM "Unimplemented" error translates to "unimplemented_in_sm_backend" api error
CA-177424: SM "Unimplemented" error translates to "unimplemented_in_sm_backend" api error

Signed-off-by: sharad yadav <0ab5d8dd51ae0f2f9ed283cbbbb7a94d110e3347@citrix.com>

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