fix: set default configFile

(cherry picked from commit a5e8d7aa15)

dspace-api/src/main/java/org/dspace/app/statistics/LogAnalyser.java

@@ -281,10 +281,14 @@ public class LogAnalyser {
      */
     private static String fileTemplate = "dspace\\.log.*";
 
+    private static final ConfigurationService configurationService =
+            DSpaceServicesFactory.getInstance().getConfigurationService();
+
     /**
      * the configuration file from which to configure the analyser
      */
-    private static String configFile;
+    private static String configFile = configurationService.getProperty("dspace.dir")
+            + File.separator + "config" + File.separator + "dstat.cfg";
 
     /**
      * the output file to which to write aggregation data
@@ -616,8 +620,6 @@ public class LogAnalyser {
         }
 
         // now do the host name and url lookup
-        ConfigurationService configurationService
-                = DSpaceServicesFactory.getInstance().getConfigurationService();
         hostName = Utils.getHostName(configurationService.getProperty("dspace.ui.url"));
         name = configurationService.getProperty("dspace.name").trim();
         url = configurationService.getProperty("dspace.ui.url").trim();
@@ -658,8 +660,6 @@ public class LogAnalyser {
                                      String myConfigFile, String myOutFile,
                                      Date myStartDate, Date myEndDate,
                                      boolean myLookUp) {
-        ConfigurationService configurationService
-                = DSpaceServicesFactory.getInstance().getConfigurationService();
 
         if (myLogDir != null) {
             logDir = myLogDir;
@@ -673,9 +673,6 @@ public class LogAnalyser {
 
         if (myConfigFile != null) {
             configFile = myConfigFile;
-        } else {
-            configFile = configurationService.getProperty("dspace.dir")
-                    + File.separator + "config" + File.separator + "dstat.cfg";
         }
 
         if (myStartDate != null) {