This proposal is for a performance improvement of list APIs of Tacker
for considering actual usecases in which a lot of entries, for
example thousands or more. From our simple evaluation, it takes 10
seconds or more for the usecases and it must be too long for users.
So, we'll reduce the time of querying, especially for typical
usecases.
Implements: blueprint perf-improve-list-apis
Change-Id: I164a55f349d71fe732127675c0851f8f48911095
f43cc9ea9e