fix: return waytype instead of waytypes for extra info

CHANGELOG.md

@@ -40,6 +40,7 @@ Releasing is documented in RELEASE.md
 - repair broken integration tests with by pining buildkit 0.15 ([#2003](https://github.com/GIScience/openrouteservice/pull/2003))
 - elevation set to false not taken into account ([#1967](https://github.com/GIScience/openrouteservice/issues/1967))
 - make gpx response adhere to standard and set version to 1.1 ([#2004](https://github.com/GIScience/openrouteservice/issues/2004))
+- return correct extra info label for 'waytype' ([#1579](https://github.com/GIScience/openrouteservice/issues/1579))
 
 ### Security
 

ors-api/src/test/java/org/heigit/ors/apitests/routing/ResultTest.java

@@ -1309,7 +1309,7 @@ void testInvalidExtraInfoWarning() {
                 .body("routes[0].extras.containsKey('suitability')", is(true))
                 .body("routes[0].extras.containsKey('surface')", is(true))
                 .body("routes[0].extras.containsKey('waycategory')", is(true))
-                .body("routes[0].extras.containsKey('waytypes')", is(true))
+                .body("routes[0].extras.containsKey('waytype')", is(true))
                 .body("routes[0].extras.containsKey('traildifficulty')", is(true))
                 .body("routes[0].extras.containsKey('green')", is(true))
                 .body("routes[0].extras.containsKey('noise')", is(true))

ors-engine/src/main/java/org/heigit/ors/routing/pathprocessors/ExtraInfoProcessor.java

@@ -164,11 +164,11 @@ public class ExtraInfoProcessor implements PathProcessor {
                         surfaceInfoBuilder = new AppendableRouteExtraInfoBuilder(surfaceInfo);
                     }
                     if (includeExtraInfo(extraInfo, RouteExtraInfoFlag.WAY_TYPE)) {
-                        wayTypeInfo = new RouteExtraInfo("waytypes");
+                        wayTypeInfo = new RouteExtraInfo("waytype");
                         wayTypeInfoBuilder = new AppendableRouteExtraInfoBuilder(wayTypeInfo);
                     }
                 } else {
-                    skippedExtras.add("surface/waytypes");
+                    skippedExtras.add("surface/waytype");
                 }
             }