Enable kernel, net and process metrics for Telegraf

Change-Id: I008818853c2058746be08365283b949177efa254
Depends-On: I3c3c569a013aff8c3ab8e46cffb93a60d74ddf09
diff --git a/linux/meta/telegraf.yml b/linux/meta/telegraf.yml
index 891bc98..bc689ae 100644
--- a/linux/meta/telegraf.yml
+++ b/linux/meta/telegraf.yml
@@ -5,5 +5,8 @@
       totalcpu: true
     disk:
     diskio:
+    kernel:
+    net:
     mem:
+    processes:
     system: