Update report messages.

src/main/kotlin/KafkaTopology.kt

@@ -83,7 +83,7 @@ class KafkaTopology(
 
         handledStream[0]
             .mapValues { readOnlyKey, value ->
-                Report(readOnlyKey, ReportStatus.fatal, value.third, Service.step).toJson()
+                Report(readOnlyKey, ReportStatus.fatal, "CONFIGURATION ERROR: ${value.third}", Service.step).toJson()
             }
             .to(reportTopic)
 
@@ -221,7 +221,7 @@ class KafkaTopology(
                 result.first,
                 Pair(
                     result.second,
-                    Report(result.first, ReportStatus.success, "", Service.step)
+                    Report(result.first, ReportStatus.success, "Generated RDF document.", Service.step)
                 )
             )
         } else {
@@ -260,10 +260,10 @@ class KafkaTopology(
             }
         } catch (ex: InvalidMappingException) {
             log.error(ex.localizedMessage)
-            Triple(null, null, Report(key, ReportStatus.fatal, ex.localizedMessage, Service.step))
+            Triple(null, null, Report(key, ReportStatus.fatal, "InvalidMappingException: ${ex.localizedMessage}", Service.step))
         } catch (ex: KlaxonException) {
             log.error(ex.localizedMessage)
-            Triple(null, null, Report(key, ReportStatus.fatal, ex.localizedMessage, Service.step))
+            Triple(null, null, Report(key, ReportStatus.fatal, "KLAXON EXCEPTION: ${ex.localizedMessage}", Service.step))
         } catch (ex: NullPointerException) {
             log.error(ex.localizedMessage)
             Triple(