Fix popen bug in `rake gitlab:satellites:create`

The Satellite#create method no longer sets the `$?` global variable.
Instead, we can use the method return value to test if the satellite was
created successfully

CHANGELOG

@@ -8,6 +8,7 @@ v 6.8.0
   - Create branches via API (sponsored by O'Reilly Media)
   - Changed permission of gitlab-satellites directory not to be world accessible
   - Protected branch does not allow force push
+  - Fix popen bug in `rake gitlab:satellites:create`
 v 6.7.3
   - Fix the merge notification email not being sent (Pierre de La Morinerie)

lib/tasks/gitlab/enable_automerge.rake

@@ -27,11 +27,8 @@ namespace :gitlab do
       if project.satellite.exists?
         puts "exists already".green
       else
-        puts ""
-        project.satellite.create
-
-        print "... "
-        if $?.success?
+        print "\n... "
+        if project.satellite.create
           puts "created".green
         else
           puts "error".red