fix(model): Always construct Hash with lowercase value

Lowercasing is not required for comparing expected serialized test
results, because the serialization already takes care of the
lowercasing. However, this change improves when comparing `Hash`
instances via `equals()`.

Signed-off-by: Frank Viernau <[email protected]>

model/src/main/kotlin/Hash.kt

@@ -63,7 +63,7 @@ data class Hash(
                     algorithm = HashAlgorithm.fromString(splitValue.first())
                 )
             } else {
-                Hash(value, HashAlgorithm.create(value))
+                Hash(value.lowercase(), HashAlgorithm.create(value))
             }
         }