Replace yaml.dump with yaml.safe_dump;
In the file
/vnfm/infra_drivers/openstack/translate_template.py#L453
/vnfm/tosca/utils.py#L267
The default yaml.safe_dump does not support OrderedDict,
So Add one function for the yaml.safe_dump in the files above
yaml.safe_load is more safer than yaml.load, that's the patch meaning
Change-Id: Iab0e976b1163220bd78c2ceda83243c2da4c6624
Closes-Bug: #1673294