Iterate over all account for analysis archive processing.
Iterate over all account for analysis archive processing.

Fixes issue where only accounts with rules were processed, which
caused global rules to not be applied to accounts that did not also
have account-scoped archive rules.

Fixes #503

Signed-off-by: Zach Hill <9de8c4480303b5335cd2a33eefe814615ba3612a@anchore.com>

anchore/anchore-engine,anchore/anchore-engine,anchore/anchore-engine