Sliced out Provider-ish API from ClockService

Change-Id: I438815f2dc7a3a304f7dc8fb09550b2a5f779265
diff --git a/core/store/hz/net/src/main/java/org/onlab/onos/store/device/impl/NoOpClockProviderService.java b/core/store/hz/net/src/main/java/org/onlab/onos/store/device/impl/NoOpClockProviderService.java
new file mode 100644
index 0000000..b68620a
--- /dev/null
+++ b/core/store/hz/net/src/main/java/org/onlab/onos/store/device/impl/NoOpClockProviderService.java
@@ -0,0 +1,20 @@
+package org.onlab.onos.store.device.impl;
+
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Service;
+import org.onlab.onos.cluster.MastershipTerm;
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.store.ClockProviderService;
+
+// FIXME: Code clone in onos-core-trivial, onos-core-hz-net
+/**
+ * Dummy implementation of {@link ClockProviderService}.
+ */
+@Component(immediate = true)
+@Service
+public class NoOpClockProviderService implements ClockProviderService {
+
+    @Override
+    public void setMastershipTerm(DeviceId deviceId, MastershipTerm term) {
+    }
+}
diff --git a/core/store/hz/net/src/main/java/org/onlab/onos/store/device/impl/NoOpClockService.java b/core/store/hz/net/src/main/java/org/onlab/onos/store/device/impl/NoOpClockService.java
deleted file mode 100644
index 2c443e9..0000000
--- a/core/store/hz/net/src/main/java/org/onlab/onos/store/device/impl/NoOpClockService.java
+++ /dev/null
@@ -1,32 +0,0 @@
-package org.onlab.onos.store.device.impl;
-
-import org.apache.felix.scr.annotations.Component;
-import org.apache.felix.scr.annotations.Service;
-import org.onlab.onos.cluster.MastershipTerm;
-import org.onlab.onos.net.DeviceId;
-import org.onlab.onos.store.ClockService;
-import org.onlab.onos.store.Timestamp;
-
-// FIXME: Code clone in onos-core-trivial, onos-core-hz-net
-/**
- * Dummy implementation of {@link ClockService}.
- */
-@Component(immediate = true)
-@Service
-public class NoOpClockService implements ClockService {
-
-    @Override
-    public Timestamp getTimestamp(DeviceId deviceId) {
-        return new Timestamp() {
-
-            @Override
-            public int compareTo(Timestamp o) {
-                throw new IllegalStateException("Never expected to be used.");
-            }
-        };
-    }
-
-    @Override
-    public void setMastershipTerm(DeviceId deviceId, MastershipTerm term) {
-    }
-}