[ONOS-4016] Implement Region administration REST API

- Impelent Region management REST API
- Add unit test for Region management REST API
- Add swagger docs for Region management REST API
- Add SCR Component and Service annotation for RegionManager

Change-Id: I042e92ed7144d596659b779a59239afba832ca62
diff --git a/web/api/src/main/java/org/onosproject/rest/resources/CoreWebApplication.java b/web/api/src/main/java/org/onosproject/rest/resources/CoreWebApplication.java
index 59652f9..1fa6f79 100644
--- a/web/api/src/main/java/org/onosproject/rest/resources/CoreWebApplication.java
+++ b/web/api/src/main/java/org/onosproject/rest/resources/CoreWebApplication.java
@@ -46,7 +46,8 @@
                 MetricsWebResource.class,
                 FlowObjectiveWebResource.class,
                 MulticastRouteWebResource.class,
-                DeviceKeyWebResource.class
+                DeviceKeyWebResource.class,
+                RegionsWebResource.class
         );
     }
 }