Making number of components configurable using the central component configuration subsystem.

Change-Id: Ia32c51480913689339a766d9849e792d62f7d133
diff --git a/providers/null/link/src/main/resource/org/onosproject/provider/nil/link/impl/NullLinkProvider.cfgdef b/providers/null/link/src/main/resource/org/onosproject/provider/nil/link/impl/NullLinkProvider.cfgdef
new file mode 100644
index 0000000..f1dda76
--- /dev/null
+++ b/providers/null/link/src/main/resource/org/onosproject/provider/nil/link/impl/NullLinkProvider.cfgdef
@@ -0,0 +1,3 @@
+# Temporary: to be auto-generated in near future
+  "eventRate"|INTEGER|0|Duration between Link Event
+  "cfgFile"|STRING|"/opt/onos/apache-karaf-3.0.2/etc/linkGraph.cfg"|Topology file location