Bugfix. Call removeDuplicateContentTypeHeader

Author: Chris Wiechmann

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [1.6.1] 2022-06-27
+### Fixed
+- Added call to removeDuplicateContentTypeHeader when return header to validator
+
 ## [1.6.0] 2022-06-24
 ### Added
 - Now query parameters are by default decoded before send to the validator (e.g. otr%C3%B3s -> otrós)

src/main/java/com/axway/apim/openapi/validator/OpenAPIValidator.java

@@ -245,6 +245,7 @@ public Map<String, Collection<String>> getHeaders() {
 
 			@Override
 			public Collection<String> getHeaderValues(String name) {
+				Utils.removeDuplicateContentTypeHeader(headers);
 				return Utils.getHeaderValues(headers, name);
 			}
 		};