[ONOS-3730] Populate portSpeed for ODUCLT and OCH ports.

Also move the enum definition of ODU client port signal type outside of OduCltPort class.

Change-Id: Ibdff21d9707ad3d79587f579ad675f673cf9afeb
diff --git a/core/api/src/main/java/org/onosproject/net/CltSignalType.java b/core/api/src/main/java/org/onosproject/net/CltSignalType.java
new file mode 100644
index 0000000..5a5843e
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/CltSignalType.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2016 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.net;
+
+/**
+ * Represents ODU (Optical channel Data Unit) client port signal type.
+ *
+ * <p>
+ * See ITU G.709 "Interfaces for the Optical Transport Network (OTN)" and
+ * Open Networking Foundation "Optical Transport Protocol Extensions Version 1.0".
+ * </p>
+ */
+public enum CltSignalType {
+    /** bit rate in Mbps. */
+    CLT_1GBE(1_000),
+    CLT_10GBE(10_000),
+    CLT_40GBE(40_000),
+    CLT_100GBE(100_000);
+
+    private final long bitRate;
+
+    CltSignalType(long bitRate) {
+        this.bitRate = bitRate;
+    }
+
+    /**
+     * Return the bit rate in Mbps of the port.
+     * @return bit rate
+     */
+    public long bitRate() {
+        return this.bitRate;
+    }
+}
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