Rename {Switch,Port,Link,Host}Event -> {...}Data

Change-Id: I89d8bae8358409514132eeac00deb0c947ecf68f
diff --git a/src/main/java/net/onrc/onos/core/topology/SwitchImpl.java b/src/main/java/net/onrc/onos/core/topology/SwitchImpl.java
index 6d4e27a..27fcbce 100644
--- a/src/main/java/net/onrc/onos/core/topology/SwitchImpl.java
+++ b/src/main/java/net/onrc/onos/core/topology/SwitchImpl.java
@@ -122,7 +122,7 @@
 
     @Override
     public String getStringAttribute(String attr) {
-        return this.topology.getSwitchEvent(getDpid()).getStringAttribute(attr);
+        return this.topology.getSwitchData(getDpid()).getStringAttribute(attr);
     }
 
     @Override
@@ -137,7 +137,7 @@
 
     @Override
     public Map<String, String> getAllStringAttributes() {
-        return this.topology.getSwitchEvent(getDpid()).getAllStringAttributes();
+        return this.topology.getSwitchData(getDpid()).getAllStringAttributes();
     }
 
     @Override