Fix docker images build to handle old linux distribution#90

alquerci wants to merge 6 commits intoFriendsOfSymfony1:masterFriendsOfSymfony1/doctrine1:masterfrom

alquerci:fix-docker-images-build-to-handle-gpg-signature-expiration-of-apt-packagesalquerci/doctrine1:fix-docker-images-build-to-handle-gpg-signature-expiration-of-apt-packagesCopy head branch name to clipboard