Adding DeviceAdminService facade and tests for SimpleDeviceManager.
diff --git a/net/api/src/main/java/org/onlab/onos/net/device/DeviceAdminService.java b/net/api/src/main/java/org/onlab/onos/net/device/DeviceAdminService.java
new file mode 100644
index 0000000..8aec28a
--- /dev/null
+++ b/net/api/src/main/java/org/onlab/onos/net/device/DeviceAdminService.java
@@ -0,0 +1,28 @@
+package org.onlab.onos.net.device;
+
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.MastershipRole;
+
+/**
+ * Service for administering the inventory of infrastructure devices.
+ */
+public interface DeviceAdminService {
+
+ /**
+ * Applies the current mastership role for the specified device.
+ *
+ * @param deviceId device identifier
+ * @param role requested role
+ */
+ void setRole(DeviceId deviceId, MastershipRole role);
+
+ /**
+ * Removes the device with the specified identifier.
+ *
+ * @param deviceId device identifier
+ */
+ void removeDevice(DeviceId deviceId);
+
+ // TODO: add ability to administratively suspend/resume device
+
+}