Fixing regions command to list devices that are currently in the region.

Change-Id: I52098fb613844b786827f7bc97e7ecec581397ba
diff --git a/cli/src/main/java/org/onosproject/cli/net/RegionListCommand.java b/cli/src/main/java/org/onosproject/cli/net/RegionListCommand.java
index 019bb07..9c3910c 100644
--- a/cli/src/main/java/org/onosproject/cli/net/RegionListCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/RegionListCommand.java
@@ -42,10 +42,11 @@
             required = false, multiValued = false)
     String id = null;
 
+    private RegionService regionService;
+
     @Override
     protected void execute() {
-        RegionService regionService = get(RegionService.class);
-
+        regionService = get(RegionService.class);
         if (id == null) {
             for (Region region : getSortedRegions(regionService)) {
                 printRegion(region);
@@ -76,5 +77,6 @@
     private void printRegion(Region region) {
         print(FMT, region.id(), region.name(), region.type());
         region.masters().forEach(m -> print(FMT_MASTER, m));
+        regionService.getRegionDevices(region.id()).forEach(id -> print("  %s", id));
     }
 }