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>