Upgrade elasticsearch 6.4.3

Unable to cherry-pick, so making a new review. And
need to upgrade the version.

This upgrade fixes a few security issues as described in the JIRA.

Issue-ID: POLICY-1538
Change-Id: I467acbb1dce1a922b13a521e9dd40477c012b409
Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>
diff --git a/pom.xml b/pom.xml
index 8faf4c9..ecf0411 100644
--- a/pom.xml
+++ b/pom.xml
@@ -27,7 +27,7 @@
     </parent>
     <groupId>org.onap.policy.engine</groupId>
     <artifactId>PolicyEngineSuite</artifactId>
-    <version>1.3.5-SNAPSHOT</version>
+    <version>1.3.6-SNAPSHOT</version>
     <packaging>pom</packaging>
     <name>policy-engine</name>
     <description>The ONAP Policy Engine main pom</description>
@@ -63,7 +63,7 @@
         <jackson.version>2.9.4</jackson.version>
         <commons.fileupload.version>1.3.3</commons.fileupload.version>
         <commons.compress.version>1.18</commons.compress.version>
-        <elasticsearch.version>6.3.0</elasticsearch.version>
+        <elasticsearch.version>6.4.3</elasticsearch.version>
         <version.policy.common>1.3.4</version.policy.common>
         <version.policy.drools-application>1.3.5</version.policy.drools-application>
     </properties>