CI: fail when the daily builds cannot be uploaded via WebDAV

e.g. on unauthorized:

curl --fail -X MKCOL \
	"https://cernbox.cern.ch/cernbox/desktop/remote.php/webdav/eos/project/r/reva/www/daily/" -k
curl: (22) The requested URL returned error: 401

.drone.yml

@@ -28,10 +28,10 @@ steps:
   detach: true
   commands:
     - TZ=Europe/Berlin go run tools/create-artifacts/main.go -dev -commit ${DRONE_COMMIT} -goversion `go version | awk '{print $$3}'`
-    - curl -X MKCOL "https://cernbox.cern.ch/cernbox/desktop/remote.php/webdav/eos/project/r/reva/www/daily/" -k -u $${USERNAME}:$${PASSWORD}
-    - curl -X MKCOL "https://cernbox.cern.ch/cernbox/desktop/remote.php/webdav/eos/project/r/reva/www/daily/`date '+%Y-%m-%d'`" -k -u $${USERNAME}:$${PASSWORD}
-    - curl -X MKCOL "https://cernbox.cern.ch/cernbox/desktop/remote.php/webdav/eos/project/r/reva/www/daily/`date '+%Y-%m-%d'`/${DRONE_COMMIT}" -k -u $${USERNAME}:$${PASSWORD}
-    - for i in $(ls /drone/src/dist);do curl -X PUT -u $${USERNAME}:$${PASSWORD} https://cernbox.cern.ch/cernbox/desktop/remote.php/webdav/eos/project/r/reva/www/daily/`date '+%Y-%m-%d'`/${DRONE_COMMIT}/$${i} --data-binary @./dist/$${i} ; done
+    - curl --fail -X MKCOL "https://cernbox.cern.ch/cernbox/desktop/remote.php/webdav/eos/project/r/reva/www/daily/" -k -u $${USERNAME}:$${PASSWORD}
+    - curl --fail -X MKCOL "https://cernbox.cern.ch/cernbox/desktop/remote.php/webdav/eos/project/r/reva/www/daily/`date '+%Y-%m-%d'`" -k -u $${USERNAME}:$${PASSWORD}
+    - curl --fail -X MKCOL "https://cernbox.cern.ch/cernbox/desktop/remote.php/webdav/eos/project/r/reva/www/daily/`date '+%Y-%m-%d'`/${DRONE_COMMIT}" -k -u $${USERNAME}:$${PASSWORD}
+    - for i in $(ls /drone/src/dist);do curl --fail -X PUT -u $${USERNAME}:$${PASSWORD} https://cernbox.cern.ch/cernbox/desktop/remote.php/webdav/eos/project/r/reva/www/daily/`date '+%Y-%m-%d'`/${DRONE_COMMIT}/$${i} --data-binary @./dist/$${i} ; done
 
 - name: license-scan
   image: golang:1.13