Add following tables to pt-table-checksum default exclusion list Edit

Launchpad: https://bugs.launchpad.net/percona-toolkit/+bug/1642994

We should exclude by default the following schemas/tables:
mysql.gtid_execution
sys.sys_config
mysql.proc
mysql.inventory
mysql.plugin
percona.* (including checksums, dsns table)
test.*
percona_schema.* (some tools use this schema by default)
We already support this somewhat:
https://www.percona.com/doc/percona-toolkit/2.2/pt-table-checksum.html#cmdoption-pt-table-checksum--replicate
> The replicate table is never checksummed (the tool automatically adds this table to --ignore-tables).