ZAPI-566 add support for sync=true for createVm and deleteVm
ZAPI-566 add support for sync=true for createVm and deleteVm

misterdjules/node-sdc-clients,arekinath/node-sdc-clients,misterdjules/node-sdc-clients,joyent/node-sdc-clients,joyent/node-sdc-clients,arekinath/node-sdc-clients