Produce more readable error message in case timing place label match not found

for Hastus import file.

Author: jarkkoka

src/main/kotlin/fi/hsl/jore4/hastus/service/importing/CannotFindJourneyPatternRefByTimingPlaceLabelsException.kt

@@ -21,8 +21,15 @@ class CannotFindJourneyPatternRefByTimingPlaceLabelsException(
 
         Trip label: ${routeIdentifier.routeLabel},
         Trip direction: ${routeIdentifier.direction.wellKnownNumber},
-        Stop points: $stopLabels,
-        Place codes: ${placeCodes.map { /* replace nulls with empty strings */ it ?: "" }}
+        Stop points with place codes: ${
+            stopLabels
+                .zip(placeCodes)
+                .map { (stopLabel, nullablePlaceCode) ->
+                    nullablePlaceCode
+                        ?.let { "$stopLabel:$it" }
+                        ?: stopLabel
+                }
+        }
         """.trimIndent()
     )
 }

src/test/kotlin/fi/hsl/jore4/hastus/api/ImportControllerTest.kt

@@ -175,8 +175,7 @@ class ImportControllerTest @Autowired constructor(
 
                     Trip label: 123,
                     Trip direction: 1,
-                    Stop points: [H1000, H1001, H1002],
-                    Place codes: [1PLACE, , 2PLACE]
+                    Stop points with place codes: [H1000:1PLACE, H1001, H1002:2PLACE]
                     """.trimIndent()
                 )
             )