fix php-symfony api_input_validation lt and lte condition

Author: zhwei

modules/swagger-codegen/src/main/resources/php-symfony/api_input_validation.mustache

@@ -61,10 +61,10 @@
     {{/minimum}}
     {{#maximum}}
     {{#exclusiveMaximum}}
-        $asserts[] = new Assert\LessThan({{minimum}});
+        $asserts[] = new Assert\LessThan({{maximum}});
     {{/exclusiveMaximum}}
     {{^exclusiveMaximum}}
-        $asserts[] = new Assert\LessThanOrEqual({{minimum}});
+        $asserts[] = new Assert\LessThanOrEqual({{maximum}});
     {{/exclusiveMaximum}}
     {{/maximum}}
     {{#pattern}}