Fix version details API does not return 200 OK
Fix version details API does not return 200 OK

When use version details api http://ip:8786/v2 to get api details,
it does not return 200 OK, and the return value is empty.

This change is to correct the version details API URL.

Change-Id: I1cde2a35dc84ccaac15d6963f453fd793c54fda4
Closes-Bug: #1742336

openstack/manila,bswartz/manila,bswartz/manila,openstack/manila