Transform dashboard to use grafonnet library

But it is the same dashboard as the output.

.gitignore

@@ -0,0 +1 @@
+prometheus/apache-http-mixin/vendor

prometheus/apache-http-mixin/config.libsonnet

@@ -1,5 +1,8 @@
 {
   _config+:: {
     dashboardTags: ['apache-http-mixin'],
+    dashboardPeriod: 'now-1h',
+    dashboardTimezone: 'default',
+    dashboardRefresh: '1m',
   },
 }

prometheus/apache-http-mixin/jsonnetfile.json

@@ -0,0 +1,15 @@
+{
+  "version": 1,
+  "dependencies": [
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/grafana/grafonnet-lib.git",
+          "subdir": "grafonnet"
+        }
+      },
+      "version": "master"
+    }
+  ],
+  "legacyImports": false
+}

prometheus/apache-http-mixin/jsonnetfile.lock.json

@@ -0,0 +1,16 @@
+{
+  "version": 1,
+  "dependencies": [
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/grafana/grafonnet-lib.git",
+          "subdir": "grafonnet"
+        }
+      },
+      "version": "6db00c292d3a1c71661fc875f90e0ec7caa538c2",
+      "sum": "gF8foHByYcB25jcUOBqP6jxk0OPifQMjPvKY0HaCk6w="
+    }
+  ],
+  "legacyImports": false
+}