Renamed "devices" to "hosts" in the Topology REST API:

 * REST call path rename:
   http://%s:%s/wm/onos/topology/devices ->
   http://%s:%s/wm/onos/topology/hosts

 * Topology output JSON format: renamed field "devices" to "hosts".

OLD:
{
   ...
   "devices": [...],
   ...
}

NEW:
{
   ...
   "hosts": [...],
   ...
}

TODO in (a) separate commit(s):
 * Renaming of "Device/Devices" and "device/devices" in the Java API
 * Renaming of "Device/Devices" and "device/devices" in the backend
   implementation

Change-Id: Ic70bf166f885a1a5ba7d8d33326ff43f84d2c506
diff --git a/onoscli b/onoscli
index 0d7caee..6bfa9d0 100755
--- a/onoscli
+++ b/onoscli
@@ -162,9 +162,9 @@
             #
             Command("show", "Show command"),
             #
-            Command("show device", "Show devices"),
+            Command("show host", "Show hosts"),
             #
-            Command("show device all", "Show all devices", self.show_device_all),
+            Command("show host all", "Show all hosts", self.show_host_all),
             #
             Command("show intent", "Show intents"),
             #
@@ -300,10 +300,10 @@
         # if len(result) != 0:
         #     self.print_json_result(result)
 
-    def show_device_all(self, args):
-        "CLI command callback: show device all"
+    def show_host_all(self, args):
+        "CLI command callback: show host all"
 
-        url = "http://%s:%s/wm/onos/topology/devices" % (self.onos_ip, self.onos_port)
+        url = "http://%s:%s/wm/onos/topology/hosts" % (self.onos_ip, self.onos_port)
         result = get_json(url)
         self.print_json_result(result)