1. What is the problem
The current Nova_APIGW does not support microversion function, the service
controller uses a fixed API version number to initialize novaclient
2. What is the solution to the problem
When the service controller receives an API request, it will get the
microversion number from request headers , and use this to initialize
novaclient.
For how to get the microversion number, please refer to:
https://specs.openstack.org/openstack/nova-specs/specs/kilo/implemented/api-microversions.html
The microversion supported range is 2.1 to latest version
3. What the features need to be implemented to the Tricircle
to realize the solution
Nova_APIGW microversion support added
Change-Id: Idf44c91100e5cb8ad0355164c9be991aa54a652b