Bump Drools-Pdp to 1.6.4

Issue-ID: POLICY-2514
Signed-off-by: aditya.puthuparambil <aditya.puthuparambil@est.tech>
Change-Id: Icb874f6b91488c5003e9d22460ce57e37b11dc30
diff --git a/policy-management/pom.xml b/policy-management/pom.xml
index 7423e6e..c1190d4 100644
--- a/policy-management/pom.xml
+++ b/policy-management/pom.xml
@@ -26,7 +26,7 @@
     <parent>
         <groupId>org.onap.policy.drools-pdp</groupId>
         <artifactId>drools-pdp</artifactId>
-        <version>1.6.3-SNAPSHOT</version>
+        <version>1.6.4-SNAPSHOT</version>
     </parent>
 
     <artifactId>policy-management</artifactId>