Don't test secondary structure annotation

Setting up secondary annotation using PSIPRED is not part of the
basic HHblits installation. Furthermore, HHblits commits
2b0283251f0e05eaf7661b9570b9d01485c5e902
eb88d8ab74e23ecf337756199652b06044ae66aa
c1d86b1953b2f30996e6720273e86696b4c36d62
contain a bugfix which is not available in tag v.3.2.0 but change
the output for the secondary structure annotation.