ONOS-812 - incorrect default values in CLI help

Change-Id: Ia7e3e9d2ace870e4d6cde240087b2235308719af
diff --git a/cli/src/main/java/org/onosproject/cli/net/ConnectivityIntentCommand.java b/cli/src/main/java/org/onosproject/cli/net/ConnectivityIntentCommand.java
index 1058197..5b73b29 100644
--- a/cli/src/main/java/org/onosproject/cli/net/ConnectivityIntentCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/ConnectivityIntentCommand.java
@@ -51,7 +51,7 @@
 
     @Option(name = "-t", aliases = "--ethType", description = "Ethernet Type",
             required = false, multiValued = false)
-    private String ethTypeString = "";
+    private String ethTypeString = null;
 
     @Option(name = "--ipProto", description = "IP Protocol",
             required = false, multiValued = false)
@@ -75,7 +75,7 @@
 
     @Option(name = "-b", aliases = "--bandwidth", description = "Bandwidth",
             required = false, multiValued = false)
-    private String bandwidthString = "";
+    private String bandwidthString = null;
 
     @Option(name = "-l", aliases = "--lambda", description = "Lambda",
             required = false, multiValued = false)