Fix a potential NPE

The code must verify if the policy has been found or not

Change-Id: I41343aec40643c29180c892996e4a65d0805193e
Issue-Id: CLAMP-43
Signed-off-by: Determe, Sebastien (sd378r) <sd378r@intl.att.com>
diff --git a/src/main/java/org/onap/clamp/clds/client/OperationalPolicyDeleteDelegate.java b/src/main/java/org/onap/clamp/clds/client/OperationalPolicyDeleteDelegate.java
index e7b0be5..2c60941 100644
--- a/src/main/java/org/onap/clamp/clds/client/OperationalPolicyDeleteDelegate.java
+++ b/src/main/java/org/onap/clamp/clds/client/OperationalPolicyDeleteDelegate.java
@@ -56,13 +56,15 @@
         prop.setCurrentModelElementId(policy.getId());
 
         String responseMessage = "";
-        for (PolicyChain policyChain : policy.getPolicyChains()) {
-            prop.setPolicyUniqueId(policyChain.getPolicyId());
-            responseMessage = policyClient.deleteBrms(prop);
-        }
-        if (responseMessage != null) {
-            execution.setVariable("operationalPolicyDeleteResponseMessage", responseMessage.getBytes());
-        }
+		if(policy.isFound()){
+	        for (PolicyChain policyChain : policy.getPolicyChains()) {
+	            prop.setPolicyUniqueId(policyChain.getPolicyId());
+	            responseMessage = policyClient.deleteBrms(prop);
+	        }
+	        if (responseMessage != null) {
+	            execution.setVariable("operationalPolicyDeleteResponseMessage", responseMessage.getBytes());
+	        }
+	    }
     }
 
 }