Explicitly set empty relativePath in pom

Change-Id: Ifc8df048bb807ec8463b41301430f938deb1c02a
diff --git a/pom.xml b/pom.xml
index 8d85b80..5f49616 100644
--- a/pom.xml
+++ b/pom.xml
@@ -23,6 +23,7 @@
         <groupId>org.onosproject</groupId>
         <artifactId>onos-dependencies</artifactId>
         <version>1.10.3</version>
+        <relativePath></relativePath>
     </parent>
 
     <groupId>org.opencord</groupId>