Made breaking changes more breaking

Author: phax

phase4-lib/src/main/java/com/helger/phase4/config/AS4Configuration.java

@@ -28,6 +28,7 @@
 import com.helger.commons.ValueEnforcer;
 import com.helger.commons.concurrent.SimpleReadWriteLock;
 import com.helger.commons.equals.EqualsHelper;
+import com.helger.commons.exception.InitializationException;
 import com.helger.commons.io.resource.IReadableResource;
 import com.helger.commons.io.resourceprovider.ClassPathResourceProvider;
 import com.helger.commons.io.resourceprovider.FileSystemResourceProvider;
@@ -70,11 +71,17 @@ public final class AS4Configuration
   {
     // Since 0.11.0 - remove in 1.0
     if (StringHelper.hasText (SystemProperties.getPropertyValueOrNull ("phase4.server.configfile")))
-      LOGGER.error ("The system property 'phase4.server.configfile' is no longer supported. See https://github.com/phax/ph-commons#ph-config for alternatives.");
+      throw new InitializationException ("The system property 'phase4.server.configfile' is no longer supported." +
+                                         " See https://github.com/phax/ph-commons#ph-config for alternatives." +
+                                         " Consider using the system property 'config.file' instead.");
     if (StringHelper.hasText (SystemProperties.getPropertyValueOrNull ("as4.server.configfile")))
-      LOGGER.error ("The system property 'as4.server.configfile' is no longer supported. See https://github.com/phax/ph-commons#ph-config for alternatives.");
+      throw new InitializationException ("The system property 'as4.server.configfile' is no longer supported." +
+                                         " See https://github.com/phax/ph-commons#ph-config for alternatives." +
+                                         " Consider using the system property 'config.file' instead.");
     if (StringHelper.hasText (System.getenv ().get ("PHASE4_SERVER_CONFIG")))
-      LOGGER.error ("The environment variable 'PHASE4_SERVER_CONFIG' is no longer supported. See https://github.com/phax/ph-commons#ph-config for alternatives.");
+      throw new InitializationException ("The environment variable 'PHASE4_SERVER_CONFIG' is no longer supported." +
+                                         " See https://github.com/phax/ph-commons#ph-config for alternatives." +
+                                         " Consider using the environment variable 'CONFIG_FILE' instead.");
   }
 
   /**