collectd: remove quotation on interval this is an number

The value is a number and not a string.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

utils/collectd/files/collectd.init

@@ -320,7 +320,7 @@ process_config() {
 	printf "TypesDB \"%s\"\n" "$TypesDB" >> "$COLLECTD_CONF"
 
 	config_get Interval globals Interval 30
-	printf "Interval \"%s\"\n" "$Interval" >> "$COLLECTD_CONF"
+	printf "Interval %s\n" "$Interval" >> "$COLLECTD_CONF"
 
 	config_get ReadThreads globals ReadThreads 2
 	printf "ReadThreads \"%s\"\n" "$ReadThreads" >> "$COLLECTD_CONF"