./test/hs/hbal $BACKEND_EXCL --exclude-instances no-such-instance
>>>2 /Unknown instance/
>>>= !0

./test/hs/hbal $BACKEND_EXCL --select-instances no-such-instances
>>>2 /Unknown instance/
>>>= !0

./test/hs/hbal $BACKEND_EXCL --exclude-instances new-0 --select-instances new-1
>>>= 0

# Test exclusion tags too (both from the command line and cluster tags).
./test/hs/hbal -t $TESTDATA_DIR/hbal-excl-tags.data --exclusion-tags test
>>> /Cluster score improved/
>>>= 0