[BUGFIX] sys_template: Can't save "basedOn" configuration

Since the merge of the resources-removal
TypoScript templates can't save "basedOn"
changes because of a SQL error, as the
resources field is still referenced by
the tca and ext_tables.php.

Change-Id: I548af5a41375b69563c3822a7c8b96687bdf9487
Fixes: #39937
Releases: 6.0
Reviewed-on: http://review.typo3.org/13903
Reviewed-by: Philipp Gampe
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn