fix references to old variables and to other files

Signed-off-by: paulfantom <pawel@krupa.net.pl>

examples/additional-namespaces-servicemonitor.jsonnet

@@ -1,11 +1,13 @@
-local kp = (import 'kube-prometheus/kube-prometheus.libsonnet') + {
-  _config+:: {
-    namespace: 'monitoring',
+local kp = (import 'kube-prometheus/main.libsonnet') + {
+  values+:: {
+    common+: {
+      namespace: 'monitoring',
+    },
     prometheus+:: {
       namespaces+: ['my-namespace', 'my-second-namespace'],
     },
   },
-  prometheus+:: {
+  prometheus+: {
     serviceMonitorMyNamespace: {
       apiVersion: 'monitoring.coreos.com/v1',
       kind: 'ServiceMonitor',