Fix dashboard uid overriding by grafanaDashboardIDs map

Author: oik741

dashboards/defaults.libsonnet

@@ -6,7 +6,7 @@
   // of the file name and set the timezone to be 'default'.
   grafanaDashboards:: {
     [filename]: grafanaDashboards[filename] {
-      uid: std.md5(filename),
+      uid: std.get(kubernetesMixin._config.grafanaDashboardIDs, filename, default=std.md5(filename)),
       timezone: kubernetesMixin._config.grafanaK8s.grafanaTimezone,
       refresh: kubernetesMixin._config.grafanaK8s.refresh,
       tags: kubernetesMixin._config.grafanaK8s.dashboardTags,