Run s3 primary tests sequential

To avoid casual test failures.

Concurrent jobs may try to use the same port forwarding for the minio container.

Signed-off-by: Daniel Kesselberg <mail@danielkesselberg.de>

.github/workflows/s3-primary.yml

@@ -13,6 +13,7 @@ jobs:
     strategy:
       # do not stop on another job's failure
       fail-fast: false
+      max-parallel: 1
       matrix:
         php-versions: ['8.0']
         key: ['objectstore', 'objectstore_multibucket']
@@ -52,8 +53,6 @@ jobs:
         run: |
           sleep 10
           curl -f -m 1 --retry-connrefused --retry 10 --retry-delay 10 http://localhost:9000/minio/health/ready
-          sleep 10
-          curl -f -m 1 --retry-connrefused --retry 10 --retry-delay 10 http://localhost:9000/minio/health/ready
 
       - name: PHPUnit
         working-directory: tests