.circleci: run tests parallelly

.circleci/config.yml

@@ -55,6 +55,7 @@ jobs:
         environment:
           GO111MODULE: "on"
     working_directory: /root/go/onecloud
+    parallelism: 4
     steps:
       - checkout
       - restore_cache:

scripts/coverage.sh

@@ -33,6 +33,9 @@ profile="${coverdir}/profile.out"
 if [ -z "$pkgs" ]; then
 	pkgs="$(go list -mod vendor ./... | grep -vE 'host-image|hostimage')"
 fi
+if type circleci &>/dev/null; then
+	pkgs="$(echo "$pkgs" | circleci tests split)"
+fi
 
 echo "mode: $covermode" >"$profile"
 echo "$pkgs" | xargs -n 8 --no-run-if-empty echo \