spec: skip binstub test (#737)

Author: gildesmarais

Rakefile

@@ -60,8 +60,9 @@ task :test do
   Output.describe 'Authenticated request to GET /health_check.txt'
   sh 'docker exec html2rss-web-test curl -f http://username:password@127.0.0.1:3000/health_check.txt || exit 1'
 
-  Output.describe 'Print output of `html2rss help`'
-  sh 'docker exec html2rss-web-test html2rss help'
+  # skipped as html2rss is used in development version
+  # Output.describe 'Print output of `html2rss help`'
+  # sh 'docker exec html2rss-web-test html2rss help'
 ensure
   test_container_exists = JSON.parse(`docker inspect html2rss-web-test`).any?