Add a new parameter for Elasticsearch

Added a new parameter version to specify
which version of Elasticsearch should be deployed.

Also added a new repo for Elasticsearch ver. 5

Change-Id: Ifa2a0763ccc515f58173f42cba206da2cc55f3ba
diff --git a/linux/system/repo/elasticsearch5.yml b/linux/system/repo/elasticsearch5.yml
new file mode 100644
index 0000000..34699e8
--- /dev/null
+++ b/linux/system/repo/elasticsearch5.yml
@@ -0,0 +1,12 @@
+parameters:
+  linux:
+    system:
+      repo:
+        elasticsearch:
+          source: "deb https://artifacts.elastic.co/packages/5.x/apt stable main"
+          architectures: amd64
+          key_url: "https://artifacts.elastic.co/GPG-KEY-elasticsearch"
+        elasticsearch_curator:
+          source: "deb http://packages.elastic.co/curator/4/debian stable main"
+          architectures: amd64
+          key_url: "https://packages.elastic.co/GPG-KEY-elasticsearch"