.gitlab-ci.yml: Don't use MySQL volume for tests

Fix vdj#1034
Status Job ID Name Coverage
  Test Tools
passed #594289
test_tools

00:00:09

 
  Test Quality
passed #594290
web
code_quality

00:00:09

 
  Test Unit
passed #594291
web
test_browser_unit

00:00:22

passed #594292
web
test_server_unit

00:00:17

 
  Deploy Review
passed #594293
web
deploy_review

00:00:08

manual #594294
web allowed to fail manual
stop_deploy_review
 
  Test Functional
passed #594297
web
chrome-browser-functional

00:02:57

passed #594295
web
ff32-browser-functional

00:02:28

failed #594299
docker x86_64
ff32-server-functional

00:02:19

passed #594296
web
ff45-browser-functional

00:03:04

failed #594300
docker x86_64
ff45-server-functional

00:02:34

passed #594298
legacy
old-chrome-browser-functional

00:02:48

 
  Test Functional External
skipped #594303
web
chrome-browser-functional-external
skipped #594301
web
ff32-browser-functional-external
skipped #594302
web
ff45-browser-functional-external
skipped #594304
legacy
old-chrome-browser-functional-external-chrome
 
Name Stage Failure
failed
ff45-server-functional Test Functional
Deleted: sha256:5b3042b6443dac15ef6ff277d667f752bccfbebbc74fea44c9a2b28a7b90f23e
Deleted: sha256:5bd8663e7814d561ae0760021406acc033ca68dce6c9e9cd8f8b6482578b9cc9
Deleted: sha256:77466c96ce921b01f94de3cf7267d83b055b6cfd240bdf423ea868793ecdcde4
Deleted: sha256:7c3071e3e5126de4e7c50a0a1679e1ebaff85f87cb84058d004f469b44695eea
Uploading artifacts...
Runtime platform arch=amd64 os=linux pid=15349 revision=58272c27 version=12.7.0
WARNING: server/web2py/applications/vidjil/tests/test/TEST-*.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit status 1
failed
ff32-server-functional Test Functional

Usage: docker stop [OPTIONS] CONTAINER [CONTAINER...]

Stop one or more running containers
Uploading artifacts...
Runtime platform arch=amd64 os=linux pid=391 revision=1b659122 version=12.8.0
WARNING: server/web2py/applications/vidjil/tests/test/TEST-*.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit status 1