Version bump 1.5
Version bump 1.5

* new api method get_cert_action
* fix and enhance regex validator
* fix SMTP notification module
* add validator for link in set_motd workflow
* disallow access to update metadata workflow for anonymous
* fix labels and smtp notifications

oliwel/openxpki,aleibl/openxpki,aleibl/openxpki,aleibl/openxpki,stefanomarty/openxpki,stefanomarty/openxpki,oliwel/openxpki,oliwel/openxpki,stefanomarty/openxpki,oliwel/openxpki,openxpki/openxpki,stefanomarty/openxpki,oliwel/openxpki,openxpki/openxpki,stefanomarty/openxpki,aleibl/openxpki,openxpki/openxpki,oliwel/openxpki,aleibl/openxpki,openxpki/openxpki,stefanomarty/openxpki,aleibl/openxpki