make sure the post_start hooks fails

before we were assuming the container will be close before the post_start will be executed

Signed-off-by: Guillaume Lours <705411+glours@users.noreply.github.com>

pkg/e2e/fixtures/hooks/poststart/compose-error.yaml

@@ -1,6 +1,6 @@
 services:
 
   test:
-    image: alpine
+    image: nginx
     post_start:
-      - command: sh -c 'echo env'
+      - command: sh -c 'command in error'

pkg/e2e/hooks_test.go

@@ -33,8 +33,7 @@ func TestPostStartHookInError(t *testing.T) {
 
 	res := c.RunDockerComposeCmdNoCheck(t, "-f", "fixtures/hooks/poststart/compose-error.yaml", "--project-name", projectName, "up", "-d")
 	res.Assert(t, icmd.Expected{ExitCode: 1})
-	assert.Assert(t, strings.Contains(res.Combined(), "Error response from daemon: container"), res.Combined())
-	assert.Assert(t, strings.Contains(res.Combined(), "is not running"), res.Combined())
+	assert.Assert(t, strings.Contains(res.Combined(), "test hook exited with status 127"), res.Combined())
 }
 
 func TestPostStartHookSuccess(t *testing.T) {