Ues longer scrape_interval (15 mintues)

This basically makes fluent-plugin-sigdump to produce 96 files
per day, instead of 1440 files.

Signed-off-by: Fujimoto Seiji <fujimoto@ceptord.net>

lib/fluent/plugin/in_sigdump.rb

@@ -29,7 +29,7 @@ class SigdumpInput< Fluent::Plugin::Input
       desc "Tag of the output events"
       config_param :tag, :string, default: "sigdump"
       desc "The interval time between data collection"
-      config_param :scrape_interval, :time, default: 60
+      config_param :scrape_interval, :time, default: 900
       desc "The output directory path"
       config_param :dir_path, :string, default: "/tmp"