Moved service PI classes/interfaces to appropriate package

Change-Id: I44a4aba848fd758a78a28eb484b7f579e3f22d08
diff --git a/core/net/src/main/java/org/onosproject/net/pi/impl/PiTranslationServiceImpl.java b/core/net/src/main/java/org/onosproject/net/pi/impl/PiTranslationServiceImpl.java
index 68a2d20..3cb0a09 100644
--- a/core/net/src/main/java/org/onosproject/net/pi/impl/PiTranslationServiceImpl.java
+++ b/core/net/src/main/java/org/onosproject/net/pi/impl/PiTranslationServiceImpl.java
@@ -30,7 +30,7 @@
 import org.onosproject.net.pi.model.PiPipeconf;
 import org.onosproject.net.pi.runtime.PiActionGroup;
 import org.onosproject.net.pi.runtime.PiTableEntry;
-import org.onosproject.net.pi.runtime.PiTranslationService;
+import org.onosproject.net.pi.service.PiTranslationService;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;