remove py version from scripts

CI/run_pytest.sh

 #!/bin/bash
 
 # run pytest for all run_modules
-python3.6 -m pytest --html=report.html --self-contained-html test/ | tee test_results.out
+python -m pytest --html=report.html --self-contained-html test/ | tee test_results.out
 
 IS_FAILED=$?
 

CI/run_pytest_coverage.sh

 #!/usr/bin/env bash
 
 # run coverage twice, 1) for html deploy 2) for success evaluation
-python3.6 -m pytest --cov=mlair --cov-report term  --cov-report html test/ | tee coverage_results.out
+python -m pytest --cov=mlair --cov-report term  --cov-report html test/ | tee coverage_results.out
 
 IS_FAILED=$?