Template parsing: ignore unknown kinds

When the template specifies a Kind that is unknown, ignore it rather than expecting Kind::Other

Without this change, FindObjects returns nothing in situation where it is expected to return certificates
by certutil

pkcs11/src/backend/object.rs

@@ -34,7 +34,9 @@ fn parse_key_requirements(template: Option<CkRawAttrTemplate>) -> Result<KeyRequ
                 debug!("attr {:?}: {:?}", attr.type_(), attr.val_bytes());
 
                 if attr.type_() == CKA_CLASS {
-                    kind = unsafe { attr.read_value::<CK_OBJECT_CLASS>() }.map(ObjectKind::from)
+                    kind = unsafe { attr.read_value::<CK_OBJECT_CLASS>() }
+                        .map(ObjectKind::from)
+                        .filter(|k| *k != ObjectKind::Other);
                 }
 
                 if attr.type_() == CKA_ID {