Add additional granularity to HTTP Request Grafana

[martinbrose]

Closes #358:

• Help requested - latency spikes #358

Adding additional 5 granularity overviews of the HTTP Request Duration to enable the user to troubleshoot further, showing HTTP Request Duration:

• Connect
• Processing
• Resolve
• TLS
• Transfer

Example screenshots:

[martinbrose]

Somehow my softmin and softmax are not working. Will need to look into that.

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[martinbrose]

Updated my branch:

• brought it up to the current master
• updated to lastest time series template in Grafana
• fixed my soft min and soft max issue
• added jitter in line with discussion Jitter #469
• added units to the graphs

Tested on two Raspberry Pis with Debian and Vagrant Debian & Ubuntu instances. Works well thus far and didn't see any issues in the Grafana docker log or in the Grafana UI.

Example screenshot:

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