sync artifactId with buck artifact

- pcep app related

Change-Id: I1ba0a966d14fee52268cd195e843d3354a599940
diff --git a/apps/pce/pom.xml b/apps/pce/pom.xml
index e66949d..29d57af 100644
--- a/apps/pce/pom.xml
+++ b/apps/pce/pom.xml
@@ -24,7 +24,7 @@
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
-    <artifactId>onos-pce</artifactId>
+    <artifactId>onos-apps-pce</artifactId>
 
     <packaging>pom</packaging>
     <description>PCE as central controller</description>