Issue #3502879 by grimreaper, heddn, fjgarlin, jonathan1055: Build task fails...

Issue #3502879 by grimreaper, heddn, fjgarlin, jonathan1055: Build task fails on project without composer.json file

includes/include.drupalci.main-d7.yml

@@ -359,8 +359,8 @@ stages:
     - echo -e "\e[0Ksection_end:`date +%s`:symlink_output\r\e[0K"
     # Delete the current composer.json, and then restore from backup if one was made earlier.
     - |
-      rm $_WEB_ROOT/sites/all/modules/custom/$CI_PROJECT_NAME/composer.json
       if [[ -f composer.json.backup ]]; then
+        rm $_WEB_ROOT/sites/all/modules/custom/$CI_PROJECT_NAME/composer.json
         echo "Restoring composer.json.backup to $_WEB_ROOT/sites/all/modules/custom/$CI_PROJECT_NAME/composer.json"
         mv composer.json.backup $_WEB_ROOT/sites/all/modules/custom/$CI_PROJECT_NAME/composer.json
       fi