message: fix warnings for backend gulp task remap:coverage
diff: @@ -115,7 +115,7 @@ gulp.task(REMAP_COVERAGE, function() {
  fail: true,
  reports: {
  "html": "./coverage",
  - "json": "./coverage",
  + "json": "./coverage/coverage-report.json",
  "text-summary": null,
  "lcovonly": "./coverage/lcov.info"
  }
  