CuratedPackage: Conditionally lower the severity of unmapped licenses

If a concluded license is set, declared licenses are likely not taken
into account at all (depending on policy rules), so lower the severity of
unmapped declared licneses in this case.

Fixes #4081.

Signed-off-by: Sebastian Schuberth <[email protected]>

model/src/main/kotlin/CuratedPackage.kt

@@ -49,15 +49,17 @@ data class CuratedPackage(
     /**
      * Check if this package contains any erroneous data.
      */
-    fun collectIssues(): List<OrtIssue> =
-        pkg.declaredLicensesProcessed.unmapped.map { unmappedLicense ->
+    fun collectIssues(): List<OrtIssue> {
+        val severity = pkg.concludedLicense?.let { Severity.HINT } ?: Severity.WARNING
+        return pkg.declaredLicensesProcessed.unmapped.map { unmappedLicense ->
             OrtIssue(
-                severity = Severity.WARNING,
+                severity = severity,
                 source = pkg.id.toCoordinates(),
                 message = "The declared license '$unmappedLicense' could not be mapped to a valid license or " +
                         "parsed as an SPDX expression."
             )
         }
+    }
 
     /**
      * Return a [Package] representing the same package as this one but which does not have any curations applied.