Ensure drupalorg_metrics works on D7

Here's a patch that gets the metrics page working, except for the commits stuff, which needs to wait. (Issue for that is: #1683846: Turn on commit-related parts of drupalorg_metrics).

I'll double-check applying this patch and report back...

This patch seems to work fine... There is one bluecheese/formatting change: the links at the top of the /metrics page are in-line on drupal.org/ and a vertical list on the dev D7 site.

Maybe related to another issue but after aplying the patch, activated the module and executed the function drupalorg_metrics_record_stats, I'm getting a javascript error on the metrics page :
jQuery.plot is not a function

It could be that there are dependencies of this module that are on drupal.org but that you do not have. I don't know what they would be, but the patch does work fine on a drupal.org d7 dev site... It looks like you are missing a jQuery library...

Yeah the flot librairy was missing. Works fine with it.

The flot module is already a dependency of this module, so I don't think we need to change the module or the patch in any way.