fix travis ubuntu image
for now we use a deprecated image because default new one failed: https://framagit.org/ideascube/pibox-installer/blob/master/.travis.yml#L57
it will be remove in September.
I have to find have changed
Edited by thiolliere
for now we use a deprecated image because default new one failed: https://framagit.org/ideascube/pibox-installer/blob/master/.travis.yml#L57
it will be remove in September.
I have to find have changed