[ONOS-1925]
1.fix javadocs bugs.
2.add pcep tunnel provider;
3.change pcep to pcep app;
4.fix some bugs according to review suggestions.

Change-Id: I4b90d9bf871dee3be70615d66db3d74f2fd85389
diff --git a/apps/pom.xml b/apps/pom.xml
index 4b88dfa..69f767b 100644
--- a/apps/pom.xml
+++ b/apps/pom.xml
@@ -49,6 +49,7 @@
         <module>segmentrouting</module>
         <module>cordfabric</module>
         <module>xos-integration</module>
+        <module>pcep-api</module>
     </modules>
 
     <properties>