Loop report customization

[termi-official]

Trying to triage #521 . Here is a sketch of what I think should work out, but I have not even a clue why it does not work out and cannot find a good way to debug it.

The main idea is to pass queries from the command line for a fine grained control over aggregation of the time series data as in

export CALI_LOG_VERBOSITY=10
export CALI_SERVICES_ENABLE=debug,mpi
for NP in 1 2
do
    export CALI_REPORT_FILENAME="$NP/performance-report-%mpi.rank%.cali"
    CALI_CONFIG=loop-report\(format=json,loop_timeseries_local_aggregation_query=\"" Block,scale(time.duration.ns,1e-9),ratio(loop.iterations,time.duration.ns,1e9),\*"\"\) mpirun -np $NP executable ...
done

Interestingly the additional "*" in the query does not add any information. Also, I don't understand why %mpi.rank% is empty here, since it does work for other configurations.