Interfaces added for PCEP messages and PCEP Controller

Change-Id: Id678b6832b42bcf4a437322996244d224c4052d0
diff --git a/pcep/api/src/main/java/org/onosproject/pcep/controller/PcepPacketStats.java b/pcep/api/src/main/java/org/onosproject/pcep/controller/PcepPacketStats.java
new file mode 100755
index 0000000..92bb2db
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+++ b/pcep/api/src/main/java/org/onosproject/pcep/controller/PcepPacketStats.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.pcep.controller;
+
+/**
+ * The representation for PCEP packet statistics.
+ */
+public interface PcepPacketStats {
+
+    /**
+     * Returns the count for no of packets sent out.
+     *
+     * @return int value of no of packets sent
+     */
+    public int outPacketCount();
+
+    /**
+     * Returns the count for no of packets received.
+     *
+     * @return int value of no of packets sent
+     */
+    public int inPacketCount();
+
+    /**
+     * Returns the count for no of wrong packets received.
+     *
+     * @return int value of no of wrong packets received
+     */
+    public int wrongPacketCount();
+
+    /**
+     * Returns the time value.
+     *
+     * @return long value of time
+     */
+    public long getTime();
+
+    /**
+     * Sets the time value.
+     *
+     * @param time long value of time
+     */
+    public void setTime(long time);
+
+}