Escape yaml string to configure VDU
Escape yaml string to configure VDU

Use 'unicode_escape' to escape YAML while configuring
VDU at the time of vnf-create or vnf-update using --config
flag

Change-Id: Ia4543b9437f28b4e6312bbd2fab9a7c47dd9f610
Partial-Bug: #1501079

stackforge/python-tackerclient,openstack/python-tackerclient,openstack/python-tackerclient,stackforge/python-tackerclient