[freeze break request] Add ResolveInterval option to collectd clients

[Ricky Elrod]

By default collectd's Network module won't attempt to re-resolve
hostnames if it fails for some reason (e.g. network not being available
when it's first started).

However there's a fairly recently added option called ResolveInterval
which will force it to re-resolve after N seconds if it fails. The
example in the collectd repo uses 4 hours (14400 seconds) so I used
that, but we could probably bump it down a bit if we wanted.

Patch follows.

commit 34138a9e598a4fad54380ef692d70c71d7e08e41
Author: Ricky Elrod <codeblock(a)fedoraproject.org&gt;
Date:   Mon May 25 03:33:34 2015 +0000

    [collectd/base] re-resolve dns lookup after a few hours if it fails

    see: https://github.com/collectd/collectd/pull/732

    Signed-off-by: Ricky Elrod <codeblock(a)fedoraproject.org&gt;

diff --git a/roles/collectd/base/files/network-client.conf
b/roles/collectd/base/files/network-client.conf
index a6bd125..53f74b7 100644
--- a/roles/collectd/base/files/network-client.conf
+++ b/roles/collectd/base/files/network-client.conf
@@ -2,4 +2,5 @@ LoadPlugin network

 <Plugin "network">
         Server "log01"
+        ResolveInterval 14400
 </Plugin>