FIX: logging configuration

src/main/java/org/caosdb/server/logging/log4j/CustomConfigurationFactory.java

@@ -54,7 +54,7 @@ public class CustomConfigurationFactory extends PropertiesConfigurationFactory {
     LOGGER.debug("Reconfiguration is done by {}", getClass().toString());
 
     List<String> sources = getConfigFiles();
-    if (sources.size() > 1) {
+    if (sources.size() > 0) {
       final List<AbstractConfiguration> configs = new ArrayList<>();
       for (final String sourceLocation : sources) {
         LOGGER.debug("Reconfigure with {}", sourceLocation);