Wrong category test result text is used when RPKI ROA is missing

[baknu]

When a RPKI ROA is missing we currently display:

• test/siterpki/failed/
• test/mailrpki/failed/

Instead we should use the following texts:

• test/siterpki/warning/
• test/mailrpki/warning/

The first couple of text labels are only applicable when a non-matching ROA is found.

Maybe we should rename the latter couple of text labels, because we now consider not having an RPKI ROA a failure.
This bug probably got introduced with v1.9.0 when RPKI started to weigh into Internet.nl score.

See also helpdesk ticket 711742.