Deprecating PortDiscovery in favour of DeviceDescritpionDiscovery

Change-Id: Ie9cff7937412c62c8a5a3b75b87a43952017f146
diff --git a/core/api/src/main/java/org/onosproject/net/device/DeviceDescriptionDiscovery.java b/core/api/src/main/java/org/onosproject/net/device/DeviceDescriptionDiscovery.java
index 4bc624b..f7649b0 100644
--- a/core/api/src/main/java/org/onosproject/net/device/DeviceDescriptionDiscovery.java
+++ b/core/api/src/main/java/org/onosproject/net/device/DeviceDescriptionDiscovery.java
@@ -28,7 +28,7 @@
 public interface DeviceDescriptionDiscovery extends HandlerBehaviour {
 
     /**
-     * Returns device description appropriately annotated to support
+     * Returns a device description appropriately annotated to support
      * downstream model extension via projections of the resulting device,
      * as in the following example.
      * <pre>
@@ -40,7 +40,7 @@
     DeviceDescription discoverDeviceDetails();
 
     /**
-     * Returns list of port descriptions appropriately annotated to support
+     * Returns a list of port descriptions appropriately annotated to support
      * downstream model extension via projections of their parent device,
      * as in the following example.
      * <pre>