Issue swagger-api#2116. Fix cross-path reference parameter ref resolve

Author: ludovicianul

modules/swagger-parser-v3/src/main/java/io/swagger/v3/parser/processors/ParameterProcessor.java

@@ -87,6 +87,12 @@ public List<Parameter> processParameters(List<Parameter> parameters) {
             if (parameter.get$ref() != null) {
                 RefFormat refFormat = computeRefFormat(parameter.get$ref());
                 final Parameter resolvedParameter = cache.loadRef(parameter.get$ref(), refFormat, Parameter.class);
+
+                if (parameter.get$ref().startsWith("#/paths")) {
+                    processedPathLevelParameters.add(parameter);
+                    continue;
+                }
+
                 if (parameter.get$ref().startsWith("#") && parameter.get$ref().indexOf("#/components/parameters") <= -1) {
                     //TODO: Not possible to add warning during resolve doesn't accept result as an input. Hence commented below line.
                     //result.warning(location, "The parameter should use Reference Object to link to parameters that are defined at the OpenAPI Object's components/parameters.");