Print RFC 4108 hwSerialNum in hex format

Signed-off-by: Victor Barpp Gomes <17840319+Kabbah@users.noreply.github.com>
diff --git a/tests/suites/test_suite_x509parse.data b/tests/suites/test_suite_x509parse.data
index 066d6e4..f703944 100644
--- a/tests/suites/test_suite_x509parse.data
+++ b/tests/suites/test_suite_x509parse.data
@@ -96,7 +96,7 @@
 
 X509 CRT information EC, SHA256 Digest, hardware module name SAN
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C
-x509_cert_info:"data_files/server5-othername.crt":"cert. version     \: 3\nserial number     \: 4D\nissuer name       \: C=UK, O=Mbed TLS, CN=Mbed TLS othername SAN\nsubject name      \: C=UK, O=Mbed TLS, CN=Mbed TLS othername SAN\nissued  on        \: 2019-03-24 09\:06\:02\nexpires on        \: 2029-03-21 09\:06\:02\nsigned using      \: ECDSA with SHA256\nEC key size       \: 256 bits\nsubject alt name  \:\n    otherName \:\n        hardware module name \:\n            hardware type          \: 1.3.6.1.4.1.17.3\n            hardware serial number \: 123456\n"
+x509_cert_info:"data_files/server5-othername.crt":"cert. version     \: 3\nserial number     \: 4D\nissuer name       \: C=UK, O=Mbed TLS, CN=Mbed TLS othername SAN\nsubject name      \: C=UK, O=Mbed TLS, CN=Mbed TLS othername SAN\nissued  on        \: 2019-03-24 09\:06\:02\nexpires on        \: 2029-03-21 09\:06\:02\nsigned using      \: ECDSA with SHA256\nEC key size       \: 256 bits\nsubject alt name  \:\n    otherName \:\n        hardware module name \:\n            hardware type          \: 1.3.6.1.4.1.17.3\n            hardware serial number \: 313233343536\n"
 
 X509 CRT information EC, SHA256 Digest, Wisun Fan device
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C
@@ -120,7 +120,7 @@
 
 X509 CRT information, Multiple different Subject Alt Name
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C
-x509_cert_info:"data_files/multiple_san.crt":"cert. version     \: 3\nserial number     \: 04\nissuer name       \: C=UK, O=Mbed TLS, CN=Mbed TLS multiple othername SAN\nsubject name      \: C=UK, O=Mbed TLS, CN=Mbed TLS multiple othername SAN\nissued  on        \: 2019-04-22 16\:10\:48\nexpires on        \: 2029-04-19 16\:10\:48\nsigned using      \: ECDSA with SHA256\nEC key size       \: 256 bits\nsubject alt name  \:\n    dNSName \: example.com\n    otherName \:\n        hardware module name \:\n            hardware type          \: 1.3.6.1.4.1.17.3\n            hardware serial number \: 123456\n    dNSName \: example.net\n    dNSName \: *.example.org\n"
+x509_cert_info:"data_files/multiple_san.crt":"cert. version     \: 3\nserial number     \: 04\nissuer name       \: C=UK, O=Mbed TLS, CN=Mbed TLS multiple othername SAN\nsubject name      \: C=UK, O=Mbed TLS, CN=Mbed TLS multiple othername SAN\nissued  on        \: 2019-04-22 16\:10\:48\nexpires on        \: 2029-04-19 16\:10\:48\nsigned using      \: ECDSA with SHA256\nEC key size       \: 256 bits\nsubject alt name  \:\n    dNSName \: example.com\n    otherName \:\n        hardware module name \:\n            hardware type          \: 1.3.6.1.4.1.17.3\n            hardware serial number \: 313233343536\n    dNSName \: example.net\n    dNSName \: *.example.org\n"
 
 X509 CRT information, Subject Alt Name + Key Usage
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_SHA1_C
@@ -184,7 +184,7 @@
 
 X509 SAN parsing otherName
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C
-x509_parse_san:"data_files/server5-othername.crt":"type \: 0\notherName \: hardware module name \: hardware type \: 1.3.6.1.4.1.17.3, hardware serial number \: 123456\n"
+x509_parse_san:"data_files/server5-othername.crt":"type \: 0\notherName \: hardware module name \: hardware type \: 1.3.6.1.4.1.17.3, hardware serial number \: 313233343536\n"
 
 X509 SAN parsing dNSName
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_SHA256_C
@@ -192,7 +192,7 @@
 
 X509 SAN parsing  Multiple different types
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_ECDSA_C:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_SHA256_C
-x509_parse_san:"data_files/multiple_san.crt":"type \: 2\ndNSName \: example.com\ntype \: 0\notherName \: hardware module name \: hardware type \: 1.3.6.1.4.1.17.3, hardware serial number \: 123456\ntype \: 2\ndNSName \: example.net\ntype \: 2\ndNSName \: *.example.org\n"
+x509_parse_san:"data_files/multiple_san.crt":"type \: 2\ndNSName \: example.com\ntype \: 0\notherName \: hardware module name \: hardware type \: 1.3.6.1.4.1.17.3, hardware serial number \: 313233343536\ntype \: 2\ndNSName \: example.net\ntype \: 2\ndNSName \: *.example.org\n"
 
 X509 SAN parsing, no subject alt name
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_SHA256_C:MBEDTLS_ECDSA_C