First changes of unit tests

* Adds build task for tests
* Changes tests to namespaces
5 jobs for tests/create-and-adapt-first-unit-tests in 11 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #5981
test

00:00:11

failed #5980
test

00:00:16

failed #5972
test

00:00:12

 
  Build
skipped #5973
build
 
  Layout
skipped #5974
layout
 
Name Stage Failure
failed
test Test There is an unknown failure, please try again
Successfully extracted cache
$ export TYPO3_PATH_WEB="$PWD/.Build/Web"
$ export COMPOSER_CACHE_DIR=.cache/composer
$ php -r "copy('https://getcomposer.org/composer.phar', 'composer.phar');"
$ php composer.phar install
Do not run Composer as root/super user! See https://getcomposer.org/root for details
Composer could not find a composer.json file in /builds/t3o/ter
To initialize a project, please create a composer.json file as described in the https://getcomposer.org/ "Getting Started" section
ERROR: Job failed: exit code 1