NullHostProvider - check for device ownership before host creation.
This is done by literal check of NodeId, as it is encoded in the
DeviceId.

Also includes minor fixes to config file parsing.

Reference: ONOS-873

Change-Id: Id333c109c3bb752dcb78ede3a4dfd94fec189cc0
diff --git a/providers/null/link/src/main/java/org/onosproject/provider/nil/link/impl/NullLinkProvider.java b/providers/null/link/src/main/java/org/onosproject/provider/nil/link/impl/NullLinkProvider.java
index a90e61c..99e46dc 100644
--- a/providers/null/link/src/main/java/org/onosproject/provider/nil/link/impl/NullLinkProvider.java
+++ b/providers/null/link/src/main/java/org/onosproject/provider/nil/link/impl/NullLinkProvider.java
@@ -103,12 +103,12 @@
             namedThreads("onos-null-link-driver"));
 
     // If true, 'flickers' links by alternating link up/down events at eventRate
-    @Property(name = "flicker", boolValue = FLICKER,
+    @Property(name = "flicker", value = "false",
             label = "Setting to flap links")
     private boolean flicker = FLICKER;
 
     // For flicker = true, duration between events in msec.
-    @Property(name = "eventRate", intValue = DEFAULT_RATE,
+    @Property(name = "eventRate", value = "3000",
             label = "Duration between Link Event")
     private int eventRate = DEFAULT_RATE;