freq_bp query cli

Implement one query CLI

• adapt the existing code for adding multiple queries
• unit and integration tests for this query

example of running the query:

bsub -w "done(append_july)" -W 4:00 -R "rusage[mem=180000]" ./run query -q bp_freq -i /cluster/scratch/rmuntean/gisaid_data/july_full_test.h5 ""

for testing the code:

./unit_tests --gtest_brief=0 --gtest_filter="*"
python ../integration_tests/main.py