Add consistent local environment for testing with docker and docker-compose

[alquerci]

Goal

• Removes all side work for contributors that do not provide any value, except effective improvements
• Provide the same testing environment for everyone.
• Help contributors to win the big challenge of PHP new versions supports, while BC layer are kept.
• Provide a bit more confidence during the development by reducing the testing feedback loop.

Usage

Look at the README.md.

In short

test/bin/test

Test results

Same matrix than travis-ci

PHP version	Dependency	Status
php53	highest	🟢
php54	highest	🟢
php55	highest	🟢
php56	highest	🟢
php70	highest	🟢
php71	highest	🟢
php72	highest	🟢
php73	highest	🔴
php74	highest	🔴

#   at [sfDoctrine] functional/AdminGenTest.php line 17
>   response selector "select" matches "NewActivePendingExpired"
           got: '
New
Active
Pending
Expired
'
      expected: 'NewActivePendingExpired'

New additional matrix (disabled by default)

PHP version	Dependency	Status
php53	lowest	🟢
php54	lowest	🟢
php55	lowest	🟢
php56	lowest	🟢
php70	lowest	🟢
php71	lowest	🟢
php72	lowest	🟢
php73	lowest	🔴
php74	lowest	🔴
php80	highest	🔴
php81	highest	🔴
php80	lowest	🔴
php81	lowest	🔴

Related to #261

[thirsch]

just a small typo-fix

[alquerci]

Add apcu for PHP 5.5+

PHP 5 => 4.0.11
PHP 7+ => 5.1.21

[alquerci]

News, APC tests failed on all versions, so by default there are disabled until patch is done.

>   ->set('test', 'some random data to store in the cache system... (\'"!#/é$£)', -10)
#   at unit/cache/sfCacheDriverTests.class.php line 22
>   ->get() returns the default value if cache has expired
           got: 'some random data to store in the cache system... (\'"!#/é$£)'
      expected: 'default'

Related to https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=805883

And it seems that APC does not support negative lifetime.

[alquerci]

@thePanz I remind you that this PR is a dependency for all new one.

[thePanz]

Please have a look at: #268

Would it be great to have the last errors fixed ... do you have any hint?

[alquerci]

@thePanz same concern as of FriendsOfSymfony1/doctrine1#89 (comment)