Sigh, CI keeps randomly failing. Remove Makefile workarounds and force

completely sequential creation and start in CI job explicitly.

.github/workflows/ci.yml

@@ -43,6 +43,8 @@ jobs:
       - name: Start services
         run: |
           grep -E "DOCKER_MIGRID_ROOT=|MIG_SYSTEM_RUN=" .env
+          echo "NOTE: use sequential start here to make docker bind mounts behave"
+          export COMPOSE_PARALLEL_LIMIT=1
           make up
       - name: Run tests
         run: |

Makefile

@@ -89,9 +89,6 @@ initcomposevars:
 	@sed -E -i 's!^([^=]*)=.*!        - \1=\$$\{\1\}!' docker-compose_shared.yml
 
 up:	initcomposevars
-	# IMPORTANT: split up into sequential create and start to avoid racy overlap.
-	#            Concurrent container creation and start breaks nested mounts.
-	${DOCKER_COMPOSE} --parallel=1 create
 	${DOCKER_COMPOSE} up -d
 
 down:	initcomposevars