Fixing an issue where common.io were not getting properly exported by onlab-thirdparty.

FIxing an issue where onos-core-primitives were not getting loaded as part of onos-core-dist feature.

Change-Id: I6e5a238770b2f896ab29cd2006db9e16ea16429b
diff --git a/utils/thirdparty/pom.xml b/utils/thirdparty/pom.xml
index 58b5e20..5a2e3bc 100644
--- a/utils/thirdparty/pom.xml
+++ b/utils/thirdparty/pom.xml
@@ -138,7 +138,7 @@
         <configuration>
           <instructions>
             <Export-Package>
-              com.googlecode.concurrenttrees.*;net.kuujo.copycat.*;io.atomix.*
+              com.googlecode.concurrenttrees.*;net.kuujo.copycat.*;io.atomix.*;org.apache.commons.io.*
             </Export-Package>
             <Import-Package>
               !sun.nio.ch,!sun.misc,*