GUACAMOLE-1123: Deprecate getHistory() method.

guacamole/src/main/java/org/apache/guacamole/rest/connection/APIConnectionWrapper.java

@@ -140,6 +140,7 @@ public class APIConnectionWrapper implements Connection {
         return null;
     }
 
+    @Deprecated
     @Override
     public List<? extends ConnectionRecord> getHistory() throws GuacamoleException {
         return Collections.<ConnectionRecord>emptyList();

guacamole/src/main/java/org/apache/guacamole/rest/user/APIUserWrapper.java

@@ -140,6 +140,7 @@ public class APIUserWrapper implements User {
         return null;
     }
 
+    @Deprecated
     @Override
     public List<? extends ActivityRecord> getHistory() throws GuacamoleException {
         return Collections.<ActivityRecord>emptyList();