Merge pull request #832 from agrare/fix_join_active_record_duration_type_error

Author: jrafanie

app/models/manageiq/providers/vmware/infra_manager/inventory/collector.rb

@@ -32,7 +32,7 @@ def stop(join_timeout = 2.minutes)
     if vim_thread
       # Give the collector thread a chance to exit cleanly, then kill it to
       # ensure we don't have multiple collector threads running.
-      result = vim_thread.join(join_timeout)
+      result = vim_thread.join(join_timeout.to_f)
       vim_thread.kill if result.nil?
     end