CHORE(vagrant): install composer 1.x instead off 2.x

Refs: #947
4 jobs for 949-vagrant-typo-sur-le-nom-du-script-00_bin-20_database_reload-sh-dans-le-msg-du-vagrant-up in 4 minutes and 4 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #49102
composer_validate

00:00:43

passed #49103
php-lint

00:00:43

passed #49104
phpcs

00:00:42

passed #49105
phpunit

00:04:03

55.86%