ci-build.sh: Reduce pytest --maxfail from 99 to 1

ci-build.sh: Reduce pytest --maxfail from 99 to 1

We want to see errors - reduce allowed errors.
With --maxfail=99 tests out of the sudden started to hang
in github, without a change in libfuse (I had actually tested
to previous release tags). With --maxfail=1 pytest aborts
and we see failing github.

Also increase python log level to NOTSET - NOTSET should print
all messages.

Also use "pytest" has wrapper for "python3 -m"