[Tempest] Refactor api/tests/admin/test_share_servers module

Doing following things:
 - Use ddt module removing code duplication.
 - Use v2 APIs instead of deprecated v1.
 - Use correct 'share_server_id' for
   'test_show_share_server_details' test to avoid concurrency issues.
   For more details, see closed b_u_g.

Change-Id: If4d6029f2250e80c1eec0debb1b09a805d997028
Closes-Bug: #1663865
1 file changed
tree: f10c22c0bd86839e81168b7b427e13223e321938
  1. manila_tempest_tests/