Add license check for vGPU

Signed-off-by: John Else <john.else@citrix.com>
Signed-off-by: Rob Hoes <rob.hoes@citrix.com>
Update edition field for Creedence

Signed-off-by: Rob Hoes <rob.hoes@citrix.com>
Merge pull request #2000 from robhoes/up

Restrictions and editions update
Update cli_frontend.ml

fix documentation for vif- and vdi mappings
Merge pull request #2038 from euanh/CA-151451

CA-151451: fix documentation for vif- and vdi mappings