Drop "I" prefix from IAction, IMatch, IMatchActionService. (ONOS-1879)

Change-Id: I6b6e0cc98570d5b95a46a9f204cf330f4cf63273
diff --git a/src/main/java/net/onrc/onos/core/matchaction/action/Action.java b/src/main/java/net/onrc/onos/core/matchaction/action/Action.java
new file mode 100644
index 0000000..373e4c8
--- /dev/null
+++ b/src/main/java/net/onrc/onos/core/matchaction/action/Action.java
@@ -0,0 +1,8 @@
+package net.onrc.onos.core.matchaction.action;
+
+/**
+ * An interface of action objects.
+ */
+public interface Action {
+
+}