Revert changes in 8117f36, which modifies the default behavior

If no command line option regarding lambda is supplied,
optical links need to be execluded, but the previous patch broke it.

Change-Id: Ia95e82f7c31fdb16345eb43f1864b58aa4f25acc
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 96fc72e..8bc0bc4 100644
--- a/cli/src/main/java/org/onosproject/cli/net/ConnectivityIntentCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/ConnectivityIntentCommand.java
@@ -115,7 +115,7 @@
 
     @Option(name = "-l", aliases = "--lambda", description = "Lambda",
             required = false, multiValued = false)
-    private Boolean lambda = null;
+    private boolean lambda = false;
 
     @Option(name = "-a", aliases = "--appId", description = "Application Id",
             required = false, multiValued = false)
@@ -313,12 +313,11 @@
         }
 
         // Check for a lambda specification
-        if (lambda != null) {
-            if (lambda) {
-                constraints.add(new LambdaConstraint(null));
-            }
-            constraints.add(new LinkTypeConstraint(lambda, Link.Type.OPTICAL));
+        if (lambda) {
+            constraints.add(new LambdaConstraint(null));
         }
+        constraints.add(new LinkTypeConstraint(lambda, Link.Type.OPTICAL));
+
         return constraints;
     }