import models only when they exist

Author: HugoMario

modules/swagger-codegen/src/main/resources/typescript-angular/index.mustache

@@ -1,5 +1,9 @@
 export * from './api/api';
+{{#models}}
+{{#-first}}
 export * from './model/models';
+{{/-first}}
+{{/models}}
 export * from './variables';
 export * from './configuration';
 export * from './api.module';