Refactor share instances tempest test

Use ddt in share instances tempest test, and use
list_share_instances instead of get_instances_of_share
in test_list_share_instances to avoid redundant test with
test_get_instances_of_share.

TrivialFix
Change-Id: I03ae35b67e76b382b04747541afab0e4f574942c
1 file changed
tree: 9d706cbb1145043f09728ebf8c399c5a660180bc
  1. manila_tempest_tests/