inveniocfg: fix of typo and disabling action chain

* NOTE it is not possible to chain actions in inveniocfg. Please split
  your calls `inveniocfg --create-demo-site --load-demo-records` into
  `inveniocfg --create-demo-site` and `inveniocfg --load-demo-records`
  accordingly in your scripts.

* NOTE `invenio-devscripts` have been amended accordingly, so if you use
  them, please just pull.

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
Reviewed-by: Tibor Simko <tibor.simko@cern.ch>