Fixed imports of models in indexFile

Fixes #291

Author: Luis Fernando Planella Gonzalez

templates/index.handlebars

@@ -3,7 +3,7 @@ export { {{baseServiceClass}} } from './{{{baseServiceFile}}}';
 export { {{requestBuilderClass}} } from './{{{requestBuilderFile}}}';
 export { {{responseClass}} } from './{{{responseFile}}}';
 export { {{moduleClass}} } from './{{{moduleFile}}}';
-{{#modelIndex.imports}}export { {{{typeName}}}{{#useAlias}} as {{{qualifiedName}}}{{/useAlias}} } from '{{{file}}}';
+{{#modelIndex.imports}}export { {{{typeName}}}{{#useAlias}} as {{{qualifiedName}}}{{/useAlias}} } from './models{{{file}}}';
 {{/modelIndex.imports}}
 {{#services}}export { {{typeName}} } from './services/{{{fileName}}}';
 {{/services}}

test/all-types.config.json

@@ -1,5 +1,6 @@
 {
   "$schema": "../ng-openapi-gen-schema.json",
   "input": "all-types.json",
-  "output": "out/all-types/"
-}
+  "output": "out/all-types/",
+  "indexFile": true
+}