Create generate-vm-json2.sh

1. Read xml files from cloudman/xml, and find dependency groups, and generate group.list3 file to indicate the vm-group information. For each group, it will create a directory named groupdir$i, for each directory (group), call generate-json-from-xml2.sh to generate the group json file named group$i.json, and then copy to $vmip.json, and put them in the directory of json-vm2.
2. Search all the related VMs of the VMs on each PM, and put them together in the directory json-group3