[JavaSpring] Fix when openapi spec file has array of files

The isArray is not checked for non-reactive isFile condition. This is remediated.

Author: SidWagz

modules/openapi-generator/src/main/resources/JavaSpring/api.mustache

@@ -273,7 +273,7 @@ public interface {{classname}} {
     }
 
     // Override this method
-    {{#jdk8-default-interface}}default {{/jdk8-default-interface}} {{>responseType}} {{operationId}}({{#allParams}}{{^isFile}}{{^isBodyParam}}{{>optionalDataType}}{{/isBodyParam}}{{#isBodyParam}}{{^reactive}}{{>optionalDataType}}{{/reactive}}{{#reactive}}{{^isArray}}Mono<{{{dataType}}}>{{/isArray}}{{#isArray}}Flux<{{{baseType}}}>{{/isArray}}{{/reactive}}{{/isBodyParam}}{{/isFile}}{{#isFile}}{{#reactive}}Flux<Part>{{/reactive}}{{^reactive}}MultipartFile{{/reactive}}{{/isFile}} {{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#reactive}}{{#hasParams}}, {{/hasParams}}{{#springFoxDocumentationProvider}}@ApiIgnore{{/springFoxDocumentationProvider}} final ServerWebExchange exchange{{/reactive}}{{#vendorExtensions.x-spring-paginated}}{{#hasParams}}, {{/hasParams}}{{^hasParams}}{{#reactive}}, {{/reactive}}{{/hasParams}}{{#springFoxDocumentationProvider}}@ApiIgnore{{/springFoxDocumentationProvider}}final Pageable pageable{{/vendorExtensions.x-spring-paginated}}){{#unhandledException}} throws Exception{{/unhandledException}} {
+    {{#jdk8-default-interface}}default {{/jdk8-default-interface}} {{>responseType}} {{operationId}}({{#allParams}}{{^isFile}}{{^isBodyParam}}{{>optionalDataType}}{{/isBodyParam}}{{#isBodyParam}}{{^reactive}}{{>optionalDataType}}{{/reactive}}{{#reactive}}{{^isArray}}Mono<{{{dataType}}}>{{/isArray}}{{#isArray}}Flux<{{{baseType}}}>{{/isArray}}{{/reactive}}{{/isBodyParam}}{{/isFile}}{{#isFile}}{{#reactive}}Flux<Part>{{/reactive}}{{^reactive}}{{#isArray}}List<MultipartFile>{{/isArray}}{{^isArray}}MultipartFile{{/isArray}}{{/reactive}}{{/isFile}} {{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#reactive}}{{#hasParams}}, {{/hasParams}}{{#springFoxDocumentationProvider}}@ApiIgnore{{/springFoxDocumentationProvider}} final ServerWebExchange exchange{{/reactive}}{{#vendorExtensions.x-spring-paginated}}{{#hasParams}}, {{/hasParams}}{{^hasParams}}{{#reactive}}, {{/reactive}}{{/hasParams}}{{#springFoxDocumentationProvider}}@ApiIgnore{{/springFoxDocumentationProvider}}final Pageable pageable{{/vendorExtensions.x-spring-paginated}}){{#unhandledException}} throws Exception{{/unhandledException}} {
         {{/delegate-method}}
         {{^isDelegate}}
         {{>methodBody}}