DeployVMCmd: Remove entityType for ipToNetworkList, MAP is string->string

Remove entityType as it can confuse people, right now we process map to string
data type maps<string,string> This map should be handled in cmd class level by
an api writer to getObject by uuid or by long int id as in getIpToNetworkMap()
of DeployVMCmd

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
DeployVMCmd: Remove @ACL on ipToNetwork map to avoid NPE

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
IPv6: Add support for IPv6 on DeployVMCmd