Merge remote-tracking branch 'remotes/origin/5.3.1-proxy' into 5.3.1

# Conflicts:
#	build.sh

build.sh

 #!/bin/bash
 PLUGIN_NAME=searchguard-kibana
-PLUGIN_VERSION=5.4.0-3-RC1
-KIBANA_VERSION=5.4.0
+PLUGIN_VERSION=5.3.1-3
+KIBANA_VERSION=5.3.1
 echo "Building $PLUGIN_NAME-$PLUGIN_VERSION.zip"
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 cd $DIR/..

package.json

 {
   "name": "searchguard",
-  "version": "5.4.0",
+  "version": "5.3.1",
   "description": "Search Guard features for kibana",
   "main": "index.js",
   "homepage": "https://floragunn.com",

upload_snapshot.sh

 #!/bin/bash
 PLUGIN_NAME=searchguard-kibana
-PLUGIN_VERSION=5.3.1-3-SNAPSHOT
+PLUGIN_VERSION=5.3.1-3
 
 echo "Uploading ./releases/$PLUGIN_VERSION/$PLUGIN_NAME-$PLUGIN_VERSION.zip"
 cresponse=$(curl --write-out %{http_code} --silent --output uploadresult -X POST -F fileUpload=@./releases/$PLUGIN_VERSION/$PLUGIN_NAME-$PLUGIN_VERSION.zip 'https://www.filestackapi.com/api/store/S3?key=$FILESTACK_KEY')