add check_instance_metadata to sudoer
diff --git a/sensu/files/sudoer b/sensu/files/sudoer
index a5853df..c5c3f6e 100644
--- a/sensu/files/sudoer
+++ b/sensu/files/sudoer
@@ -7,3 +7,4 @@
 sensu ALL=(ALL) NOPASSWD: /usr/sbin/gluster volume status*
 sensu ALL=(ALL) NOPASSWD: /usr/local/sbin/duplicity_salt.sh nagios *
 sensu ALL=(ALL) NOPASSWD: /usr/sbin/rabbitmqctl *rabbit_diagnostics*maybe_stuck()*
+sensu ALL=(ALL) NOPASSWD: /etc/sensu/plugins/check_instance_metadata.sh