Switched to original version for metrics

- up until now, we've been sending the `safe` version as data in
  metrics, but this only includes major.minor
- we'd like to be able to see how every release affects the results, so
  this commit switches to using the version that was supplied in the
  package.json so we've got more of a granular overview

ghost/core/loggingrc.js

@@ -18,7 +18,7 @@ loggingConfig.metrics.metadata = {
     // Undefined if unavailable
     siteId: config.get('hostSettings:siteId'),
     domain: config.get('url'),
-    version: ghostVersion.safe
+    version: ghostVersion.original
 };
 
 module.exports = loggingConfig;