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/ONAP-PDP-REST/pom.xml b/ONAP-PDP-REST/pom.xml
index d254d62..c28df73 100644
--- a/ONAP-PDP-REST/pom.xml
+++ b/ONAP-PDP-REST/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.onap.policy.engine</groupId>
         <artifactId>PolicyEngineSuite</artifactId>
-        <version>1.3.5-SNAPSHOT</version>
+        <version>1.3.6-SNAPSHOT</version>
     </parent>
     <artifactId>ONAP-PDP-REST</artifactId>
     <description>ONAP PDP REST</description>