fix elements

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/contactdiary/model/DefaultLocation.kt

 package de.rki.coronawarnapp.contactdiary.model
 
-data class DefaultLocation(override var location: Location) : Location
+data class DefaultLocation(override var location: String) : Location

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/contactdiary/model/DefaultPerson.kt

 package de.rki.coronawarnapp.contactdiary.model
 
-data class DefaultPerson(override var person: Person) : Person
+data class DefaultPerson(override var person: String) : Person

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/contactdiary/model/Location.kt

 package de.rki.coronawarnapp.contactdiary.model
 
 interface Location {
-    var location: Location
+    var location: String
 }

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/contactdiary/model/Person.kt

 package de.rki.coronawarnapp.contactdiary.model
 
 interface Person {
-    var person: Person
+    var person: String
 }