Fix ods_nuke_env() to understand if its MySQL and nuke all tables and view if so, this fixes general.basic.sign_added_deleted_zones test. Fixed enforcer.ods-enforcer.zones_and_zonelist test by checking for the number of enforce runs and waiting for the next one before exporting the zonelist, the problem was that the test was doing things too fast and the changes made by zonelist import had not been read up to the daemon yet.
Merge pull request #69 from jelu/fix-zone-exp