Fix openapi interceptor bug

hapi-fhir-server-openapi/src/main/java/ca/uhn/fhir/rest/openapi/OpenApiInterceptor.java

@@ -198,6 +198,8 @@ public class OpenApiInterceptor {
 					return false;
 				}
 			}
+
+			return true;
 		}
 
 		if (requestPath.startsWith("/swagger-ui/")) {

hapi-fhir-server-openapi/src/test/java/ca/uhn/fhir/rest/openapi/OpenApiInterceptorTest.java

@@ -154,6 +154,12 @@ public class OpenApiInterceptorTest {
 			assertEquals(400, response.getStatusLine().getStatusCode());
 		}
 
+		get = new HttpGet("http://localhost:" + myServer.getPort() + "/fhir?foo=foo");
+		get.addHeader(Constants.HEADER_ACCEPT, Constants.CT_HTML);
+		try (CloseableHttpResponse response = myClient.execute(get)) {
+			assertEquals(400, response.getStatusLine().getStatusCode());
+		}
+
 	}