Filters like "image_name", "flavor_name" and "project" in instance
panels are keys not supported in Nova List-Servers API directly, so they
should be converted to "image", "flavor" and "project_id", respectively,
before Horizon calling Nova List-Servers API.
That used to work, but was broken in commit
df194c8b4c because the code change messed
up the order. This commit fixes it by converting those filters first and
then calling Nova API with modified filters.
Change-Id: I504caaab2b6f256e7eb8c2605acaec39c004e80f
Closes-Bug: #1718725
6107983761