indexer: Change confusing name policy_update to skip_existing boolean
policy_update
is a variable to determine whether to update or ignore
duplicates. Prior to this commit, this was conflated with the
incremental nature of the indexer. This declares a meaningful name
instead 'incremental' and force the db policy update writing to always
update conflicting data (if any).
This policy_update
variable should probably go away.
Test Plan
tox
Migrated from D666 (view on Phabricator)