fix incidental bugs in ci test

1. sleep for a while after restart containerd
2. only show detailed logs when test failed

Signed-off-by: Yiqun Leng <yqleng@linux.alibaba.com>

tests/bats/Makefile

@@ -6,10 +6,10 @@ endif
 
 ci:
 	bash -f ./install_bats.sh
-	bats --show-output-of-passing-tests --formatter tap build_docker_image.bats
-	bats --show-output-of-passing-tests --formatter tap compile_nydusd.bats
-	bats --show-output-of-passing-tests --formatter tap compile_ctr_remote.bats
-	bats --show-output-of-passing-tests --formatter tap compile_nydus_snapshotter.bats
-	bats --show-output-of-passing-tests --formatter tap run_container_with_rafs.bats
-	bats --show-output-of-passing-tests --formatter tap run_container_with_zran.bats
-	bats --show-output-of-passing-tests --formatter tap run_container_with_rafs_and_compile_linux.bats
+	bats --formatter tap build_docker_image.bats
+	bats --formatter tap compile_nydusd.bats
+	bats --formatter tap compile_ctr_remote.bats
+	bats --formatter tap compile_nydus_snapshotter.bats
+	bats --formatter tap run_container_with_rafs.bats
+	bats --formatter tap run_container_with_zran.bats
+	bats --formatter tap run_container_with_rafs_and_compile_linux.bats

tests/bats/common_tests.sh

@@ -47,4 +47,5 @@ version = 2
    disable_snapshot_annotations = false
 EOF
   systemctl restart containerd
+  sleep 3
 }