Add support for Chromium driver

[mnocon]

JIRA: https://jira.ez.no/browse/EZP-30669

Adding support for Chromium driver in our Docker stack.
Related PR: ezsystems/ezplatform#417

[mnocon]

Travis failure is unrelated, but I'll have a look at it

[andrerom]

hmm, but seems tests are broken by the addition of yarn in 2.5.

Is it this part we need to adjust to use latest-node?

docker-php/bin/.travis/test.sh

Lines 47 to 53 in c6efa21

	printf "\nBuilding on ez_php:latest, composer will implicit check requirements\n"
	docker run -ti --rm \
	-e SYMFONY_ENV \
	-v $(pwd)/volumes/ezplatform:/var/www \
	-v $COMPOSER_HOME:/root/.composer \
	ez_php:latest \
	bash -c "composer -v && composer create-project --prefer-dist --no-progress --no-interaction ezsystems/ezplatform /var/www $EZ_VERSION"

[andrerom]

As for PHP 5.6 - 7.0 it seems to be issue with packages for Debian jessie, but given 7.1 is also jessie based it might just be temporary glitch:

W: Failed to fetch http://deb.debian.org/debian/dists/jessie-updates/InRelease  Unable to find expected entry 'main/binary-amd64/Packages' in Release file (Wrong sources.list entry or malformed file) 

7.2 failure seems to be temprary, bad gateway trying to download blackfire.

[mnocon]

About the PHP5.6 images - seems like they've been dropped from https://hub.docker.com/_/php (docker-library/php@e9320fd)

[mnocon]

The part you linked to looks like a good place to fix 7.x builds, I'll commit a change there to verify

[andrerom]

About the PHP5.6 images - seems like they've been dropped from https://hub.docker.com/_/php (docker-library/php@e9320fd)

They have stopped building new as it is no longer new releases coming for 5.6, but they existing tags still exists. We can drop it in separate PR, but the issue here is not 5.6 afaik.

[andrerom]

@mnocon for the failures, see here: #38

[mnocon]

@andrerom thanks, I'll rebase this PR after that one is merged

[mnocon]

@andrerom please have a look again - I've rebased with latest master.

The build for PHP5.6 was still red, because today new version of redis has become available on PECL, without PHP5.6 support - I'm forcing the install of latest stable that supports PHP5.6 (4.3.0) instead. Versions: https://pecl.php.net/package/redis

Please also have a look at https://github.com/ezsystems/ezplatform/pull/417/files , another PR that uses variables introduced in this one.