Supress pylint's duplicated code warning

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
diff --git a/scripts/mbedtls_dev/bignum_mod.py b/scripts/mbedtls_dev/bignum_mod.py
index 1960723..a83e136 100644
--- a/scripts/mbedtls_dev/bignum_mod.py
+++ b/scripts/mbedtls_dev/bignum_mod.py
@@ -33,6 +33,7 @@
 
 class BignumModMul(bignum_common.ModOperationCommon,
                    BignumModTarget):
+    # pylint:disable=duplicate-code
     """Test cases for bignum mpi_mod_mul()."""
     symbol = "*"
     test_function = "mpi_mod_mul"