Improve error handling for invalid input types.

src/main/kotlin/model/InputTypeAdapter.kt

@@ -19,11 +19,17 @@ package org.memobase.model
 
 import com.beust.klaxon.TypeAdapter
 import kotlin.reflect.KClass
+import org.apache.logging.log4j.LogManager
 
 class InputTypeAdapter : TypeAdapter<Input> {
+    private val log = LogManager.getLogger("InputTypeAdapter")
+
     override fun classFor(type: Any): KClass<out Input> = when(type as String) {
         "node--institution" -> Institution::class
         "node--record_set" -> RecordSet::class
-        else -> throw IllegalArgumentException("Unknown type: $type")
+        else -> {
+            log.error("Unknown input type: $type. Could not parse this input.")
+            Input::class
+        }
     }
 }
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