Allow to customize timeouts on Kubernetes plugin

[adrianlzt]

I'm using the kubernetes plugin to obtain metrics from OpenShift applications nodes.
The response time varies from 1.5s to 4s, so when it crosses the 3s barrier telegraf discard it because of timeout.

Could be possible to add some parameters to increase the timeout values?

@jchauncey ?

[danielnelson]

Yeah, I'll get it.

[jchauncey]

Ive got the work done for this. Just have to go through the channels at microsoft to submit the pr. Should have it up first thing tomorrow.

(this will be my first pr outside of my normal oss projects so I had to make sure I was following the correct protocol first =P)

[jchauncey]

So might just be easier for someone else do this or I can throw up the code somewhere that Ive got and someone else can submit it

[jchauncey]

Here is a gist with the changes - https://gist.github.com/jchauncey/325956b3d03db33fd1a3241ecf6b9e78