This patch mainly fixes the description related to the version of
ETSI NFV-SOL that Tacker complies with.
The fixes are as follows:
* Fix the supported version of SubscriptionAuthentication to
SOL013 v3.4.1
* Add comment that TLS_CERT is not supported
* Add comment that OAUTH2_CLIENT_CERT complies with SOL013 v3.5.1
* Add authentication details to the create subscription request
for VNF FM
* Fix the supported version of the coordination interface to
SOL002 v3.6.1
Change-Id: Ie0bc2c45a068a24a262709b4caba510979b0a1ce
c5cdb4462b