fix(controller): remove extra bracketing

Author: mboersma

controller/bin/boot

@@ -28,7 +28,7 @@ function etcd_set_default {
 	set +e
 	ERROR="$(etcdctl --no-sync -C "$ETCD" mk "$ETCD_PATH/$1" "$2" 2>&1 >/dev/null)"
 
-	if [[ $? -ne 0 ]] && echo "$ERROR" | grep -iqve "key already exists" ]]; then
+	if [[ $? -ne 0 ]] && echo "$ERROR" | grep -iqve "key already exists"; then
 		echo "etcd_set_default: an etcd error occurred ($ERROR)"
 		echo "aborting..."
 		exit 1