Make use of Optional more idiomatic

Change-Id: I42b3261169e7cb8408f46c5831f72115f77fd779
diff --git a/cli/src/main/java/org/onosproject/cli/app/ApplicationsListCommand.java b/cli/src/main/java/org/onosproject/cli/app/ApplicationsListCommand.java
index 9efa612..2f82f18 100644
--- a/cli/src/main/java/org/onosproject/cli/app/ApplicationsListCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/app/ApplicationsListCommand.java
@@ -15,6 +15,7 @@
  */
 package org.onosproject.cli.app;
 
+import java.net.URI;
 import java.util.Collections;
 import java.util.List;
 
@@ -75,7 +76,7 @@
                         print(FMT, isActive ? "*" : " ",
                               app.id().id(), app.id().name(), app.version(), app.origin(),
                               app.category(), app.description(), app.features(),
-                              app.featuresRepo().isPresent() ? app.featuresRepo().get().toString() : "",
+                              app.featuresRepo().map(URI::toString).orElse(""),
                               app.requiredApps(), app.permissions(), app.url());
                     }
                 }