GUACAMOLE-1511: Revert incorrect recursive constructor invocation.

A previous iteration of the whitespace-trimming changes involved an
additional constructor variation. After removing that portion, the
original constructor for PropertiesGuacamoleProperties was not restored
correctly, and now recursively invokes itself.

guacamole-ext/src/main/java/org/apache/guacamole/properties/PropertiesGuacamoleProperties.java

@@ -44,7 +44,7 @@ public class PropertiesGuacamoleProperties implements GuacamoleProperties {
      *     values exposed by this instance of PropertiesGuacamoleProperties.
      */
     public PropertiesGuacamoleProperties(Properties properties) {
-        this(properties);
+        this.properties = properties;
     }