Fix proxy for Grafana script

The prometheus/grafana script needs to download a grafana json
file by curl which doesn't work since the proxy issue. This patch
fixes it.

Task: 38167
Story: 2007005

Change-Id: I51ba108e23524eecc04bbbd47a5b50b8d4a529f9

magnum/drivers/common/templates/kubernetes/fragments/enable-prometheus-monitoring.sh

@@ -5,6 +5,18 @@ printf "Starting to run ${step}\n"
 
 . /etc/sysconfig/heat-params
 
+if [ ! -z "$HTTP_PROXY" ]; then
+    export HTTP_PROXY
+fi
+
+if [ ! -z "$HTTPS_PROXY" ]; then
+    export HTTPS_PROXY
+fi
+
+if [ ! -z "$NO_PROXY" ]; then
+    export NO_PROXY
+fi
+
 function writeFile {
     # $1 is filename
     # $2 is file content

releasenotes/notes/fix-proxy-of-grafana-script-8b408d9d103dfc06.yaml

@@ -0,0 +1,4 @@
+---
+fixes:
+  - |
+    This proxy issue of Prometheus/Grafana script has been fixed.