findAutoTagWarnings: fix use of undefined variable
findAutoTagWarnings: do not warn of $client_* tag
recalc8021QPorts: properly lock switch

It is needed, because otherwise, if the recalc oparation has executed
while an other process's deploy is taking place, the latter would mark
a switch as synchronized despite that it has a difference between its
C and D configs.
recalc8021QPorts: small optimization

use getObjectPortsAndLinks instead of spotEntity + amplifyCell