X.509 Parse Test Cases Dependent on outdated configurations

[simonbutcher]

Some of the test cases in the test_suite_x509parse are dependent on configurations which are no longer defaults in the library (such as MD2, MD5), and are only executed if all configurations are enabled.

That means if you're compiling only the default configuration you will not be executing some test cases which you should and need to.

Therefore the test cases should be reviewed, and anything that requires an old hash unnecessarily, should be upgraded to SHA256 or similar.

[ciarmcom]

ARM Internal Ref: IOTSSL-1232

[hanno-becker]

#2430 fixes this.

[Patater]

#2430 has been merged, so this issue can be considered fixed.