BZ 1080508 - make sure we set log level so the install doesn't abort

modules/enterprise/server/installer/src/main/java/org/rhq/enterprise/server/installer/InstallerServiceImpl.java

@@ -701,12 +701,19 @@ private void saveServerProperties(HashMap<String, String> serverProperties) thro
         final File serverPropertiesFile = getServerPropertiesFile();
         final PropertiesFileUpdate propsFile = new PropertiesFileUpdate(serverPropertiesFile.getAbsolutePath());
 
-        // GWT can't handle Properties - so we use HashMap but convert to Properties internally
+        // this code use to be used within GWT which is why the signature uses HashMap and we convert to Properties here
         final Properties props = new Properties();
         for (Map.Entry<String, String> entry : serverProperties.entrySet()) {
             props.setProperty(entry.getKey(), entry.getValue());
         }
 
+        // BZ 1080508 - the server will fail to install if rhq.server.log-level isn't set
+        // (as will be the case for upgrades from older versions), so force it to be set now
+        if (!props.containsKey(ServerProperties.PROP_LOG_LEVEL)) {
+            props.setProperty(ServerProperties.PROP_LOG_LEVEL, "INFO");
+            serverProperties.put(ServerProperties.PROP_LOG_LEVEL, "INFO");
+        }
+
         propsFile.update(props);
 
         // we need to put them as system properties now so when we hot deploy,