Check for blank remoteId in sadis configuration

Change-Id: I3f79e9d05d0eacf6befcb5b83e9d9bcdcf0f6174
diff --git a/app/src/main/java/org/opencord/dhcpl2relay/impl/DhcpL2Relay.java b/app/src/main/java/org/opencord/dhcpl2relay/impl/DhcpL2Relay.java
index 7a369de..7f523b9 100755
--- a/app/src/main/java/org/opencord/dhcpl2relay/impl/DhcpL2Relay.java
+++ b/app/src/main/java/org/opencord/dhcpl2relay/impl/DhcpL2Relay.java
@@ -1028,7 +1028,9 @@
             } else {
                 option82.setAgentCircuitId(entry.circuitId());
             }
-            option82.setAgentRemoteId(entry.remoteId());
+            if (entry.remoteId() != null && !entry.remoteId().isBlank()) {
+                option82.setAgentRemoteId(entry.remoteId());
+            }
             if (log.isTraceEnabled()) {
                 log.trace("adding option82 {} ", option82);
             }