Moved service PI classes/interfaces to appropriate package

Change-Id: I44a4aba848fd758a78a28eb484b7f579e3f22d08
diff --git a/apps/p4-tutorial/pipeconf/src/main/java/org/onosproject/p4tutorial/pipeconf/PortStatisticsDiscoveryImpl.java b/apps/p4-tutorial/pipeconf/src/main/java/org/onosproject/p4tutorial/pipeconf/PortStatisticsDiscoveryImpl.java
index 166958d..1f204e2 100644
--- a/apps/p4-tutorial/pipeconf/src/main/java/org/onosproject/p4tutorial/pipeconf/PortStatisticsDiscoveryImpl.java
+++ b/apps/p4-tutorial/pipeconf/src/main/java/org/onosproject/p4tutorial/pipeconf/PortStatisticsDiscoveryImpl.java
@@ -28,7 +28,7 @@
 import org.onosproject.net.pi.model.PiPipeconf;
 import org.onosproject.net.pi.runtime.PiCounterCellData;
 import org.onosproject.net.pi.runtime.PiCounterCellId;
-import org.onosproject.net.pi.runtime.PiPipeconfService;
+import org.onosproject.net.pi.service.PiPipeconfService;
 import org.onosproject.p4runtime.api.P4RuntimeClient;
 import org.onosproject.p4runtime.api.P4RuntimeController;
 import org.slf4j.Logger;