chore(scripts): minor cleanup

Author: chirayuk

karma.conf.js

@@ -97,7 +97,7 @@ module.exports = function(config) {
     },
     sauceLabs: {
         testName: 'AngularDart',
-        tunnelIdentifier: process.env.TRAVIS_JOB_NUMBER,
+        tunnelIdentifier: env.TRAVIS_JOB_NUMBER,
         startConnect: false,
         options:  {
             'selenium-version': '2.41.0',

scripts/travis/build.sh

@@ -128,7 +128,7 @@ _run_karma_tests() {(
 
     # Run sharded karma tests.
     export NUM_KARMA_SHARDS=4
-    echo {0..3} | xargs -d ' ' -n 1 -P $NUM_KARMA_SHARDS -I SHARD_ID \
+    seq 0 $((NUM_KARMA_SHARDS-1)) | xargs -n 1 -P $NUM_KARMA_SHARDS -I SHARD_ID \
       bash -c '_run_once SHARD_ID'
   else
     _run_once