Use absolute jsonnet import paths

This should be the way forward when importing libraries in jsonnet. It's
closer to how Go imports look and makes it more obvious where packages
live.

This is not breaking anything, as the old imports were already symlinks
to the now directly used directories.

Signed-off-by: Matthias Loibl <mail@matthiasloibl.com>

documentation/prometheus-mixin/dashboards.libsonnet

@@ -1,5 +1,5 @@
-local g = import 'grafana-builder/grafana.libsonnet';
-local grafana = import 'grafonnet/grafana.libsonnet';
+local grafana = import 'github.com/grafana/grafonnet-lib/grafonnet/grafana.libsonnet';
+local g = import 'github.com/grafana/jsonnet-libs/grafana-builder/grafana.libsonnet';
 local dashboard = grafana.dashboard;
 local row = grafana.row;
 local singlestat = grafana.singlestat;

documentation/prometheus-mixin/jsonnetfile.json

@@ -20,5 +20,5 @@
       "version": "master"
     }
   ],
-  "legacyImports": true
+  "legacyImports": false
 }