build(test-all): fix error due to disabled brace expansion

Author: gkalpak

scripts/private/test-all.sh

@@ -25,11 +25,11 @@ node_modules/.bin/http-server -p 8000 &
 WEBSERVER_PID=$!
 
 # Run the unit and e2e tests
-for i in {0..12}
+for i in $(seq 0 12)
 do
   git checkout -f step-$i
 
   node_modules/karma/bin/karma start test/karma.conf.js --single-run
   node_modules/.bin/protractor test/protractor-conf.js
 
-done
+done