GUACAMOLE-363: Make DEFAULT_USER_REQUIRED false.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-sqlserver/src/main/java/org/apache/guacamole/auth/sqlserver/SQLServerEnvironment.java

@@ -50,7 +50,7 @@ public class SQLServerEnvironment extends JDBCEnvironment {
      * Whether a database user account is required by default for authentication
      * to succeed.
      */
-    private static final boolean DEFAULT_USER_REQUIRED = true;
+    private static final boolean DEFAULT_USER_REQUIRED = false;
 
     /**
      * The default value for the maximum number of connections to be