Move PCE label handling from APP to protocol.

Change-Id: I26ae21b27ac2dc9ae3302030f6860e0e371c342c
diff --git a/protocols/pcep/ctl/pom.xml b/protocols/pcep/ctl/pom.xml
index 3a492a6..861fe14 100644
--- a/protocols/pcep/ctl/pom.xml
+++ b/protocols/pcep/ctl/pom.xml
@@ -50,6 +50,11 @@
             <groupId>org.onosproject</groupId>
             <artifactId>onlab-misc</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onos-core-serializers</artifactId>
+            <version>${project.version}</version>
+        </dependency>
     </dependencies>
 
     <build>