improve travis conf for avoid multiple tag

.travis.yml

@@ -4,7 +4,6 @@ git:
 
 language: node_js
 dist: trusty
-sudo: required
 node_js:
  # Use the explicit NodeJS LTS version 8.9.4 to avoid any automatic upgrade of the version.
   - '10.16.0'
@@ -129,18 +128,18 @@ jobs:
 
 
 before_deploy:
-  # Set up git user name and tag this commit
-  - git config --local user.name "Alfresco"
-  - export TRAVIS_TAG=$(cat package.json | grep version | head -1 | awk -F= "{ print $2 }" | sed 's/[version:,\",]//g' | tr -d '[[:space:]]')
-  - echo "Create tag:" $TRAVIS_TAG
-  - git tag $TRAVIS_TAG
+  if ![[ $TRAVIS_TAG ]]; then
+      git config --local user.name "Alfresco"
+      export TRAVIS_TAG=$(cat package.json | grep version | head -1 | awk -F= "{ print $2 }" | sed 's/[version:,\",]//g' | tr -d '[[:space:]]')
+      echo "Create tag:" $TRAVIS_TAG
+      git tag $TRAVIS_TAG
+  fi
 
 deploy:
   provider: releases
   api_key: $GITHUB_TOKEN
   name: $TRAVIS_TAG
   body: "Add the release note"
-  skip_cleanup: true
   on:
     branch: master