Test failures on V5-8-patches and master

Hello!

I just noticed that T0222snmpv3bulkget_simple depends on SHA authentication
and AES privacy but fails to check for this so if one builds the agent
without that support the test fails.

Now, I am not certain about exactly what T0222 tests but I think it is about
bulkget limits and thus the use of encryption and privacy is just a
distraction so I suggest that $PRIVTESTARGS is replaced with $NOAUTHTESTARGS.

If the encryption is important then the alternative is to add

SKIPIFNOT NETSNMP_CAN_DO_CRYPTO
SKIPIFNOT NETSNMP_ENABLE_SCAPI_AUTHPRIV
SKIPIFNOT HAVE_AES_CFB128_ENCRYPT

in order to skip the test when that prerequisite ain't available.

/MF