Send warning to debug instead of warn log to correct stack trace seen during installation (JM-763).

git-svn-id: http://svn.igniterealtime.org/svn/repos/wildfire/trunk@4290 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/database/SchemaManager.java

@@ -162,7 +162,7 @@ public class SchemaManager {
                 }
                 catch (SQLException sqle2) {
                     // The database schema must not be installed.
-                    Log.warn("Error verifying server version", sqle2);
+                    Log.debug("Error verifying server version", sqle2);
                 }
             }
         }