added unit test that ensures the values of AccountSummary are consistent with those of the underlying accounts
soa submodule catchup for redis spin polling fix.
Added additional timing metrics for the augmentor message flow.
restored commented test
libexchange depends on libbid_request and librtb
Merge branch 'master' into pa_loop-events_generalisation
Merge branch 'pa_loop-events_generalisation' into post_auction_event-common