ONOS-4114 Flows Post has example of criteria, swagger shows link to wiki page with full json criteria

Change-Id: Ib430c537349e4d5d5e798f7b84158b7120264d3f
diff --git a/web/api/src/main/java/org/onosproject/rest/resources/FlowsWebResource.java b/web/api/src/main/java/org/onosproject/rest/resources/FlowsWebResource.java
index e5e1dda..1e58a0f 100644
--- a/web/api/src/main/java/org/onosproject/rest/resources/FlowsWebResource.java
+++ b/web/api/src/main/java/org/onosproject/rest/resources/FlowsWebResource.java
@@ -129,7 +129,13 @@
 
     /**
      * Create new flow rule. Creates and installs a new flow rule for the
-     * specified device.
+     * specified device. <br>
+     * Instructions description:
+     * https://wiki.onosproject.org/display/ONOS/Flow+Rule+Instructions
+     * <br>
+     * Criteria description:
+     * https://wiki.onosproject.org/display/ONOS/Flow+Rule+Criteria
+     *
      * @onos.rsModel FlowsPost
      * @param deviceId device identifier
      * @param stream   flow rule JSON