All templated bash scripts should be "robust" and shellcheck-clean

[yarikoptic]

Summary

ATM produced shell scripts do not adhere to the best practices of writing shell scripts . You can use https://www.shellcheck.net/ tool to see what is wrong with them, e.g.

here is an example of running on a sample produced script

❯ shellcheck /home/yoh/proj/misc/babs/.testdata/babs_test_project/test_project/analysis/code/check_setup/call_test_job.sh

In /home/yoh/proj/misc/babs/.testdata/babs_test_project/test_project/analysis/code/check_setup/call_test_job.sh line 7:
echo I\'m in $PWD using `which python`
             ^--^ SC2086 (info): Double quote to prevent globbing and word splitting.
                        ^------------^ SC2046 (warning): Quote this to prevent word splitting.
                        ^------------^ SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

Did you mean: 
echo I\'m in "$PWD" using $(which python)


In /home/yoh/proj/misc/babs/.testdata/babs_test_project/test_project/analysis/code/check_setup/call_test_job.sh line 8:
path_check_setup=/home/yoh/proj/misc/babs/.testdata/babs_test_project/test_project/analysis/code/check_setup
^--------------^ SC2034 (warning): path_check_setup appears unused. Verify use (or export if used externally).


In /home/yoh/proj/misc/babs/.testdata/babs_test_project/test_project/analysis/code/check_setup/call_test_job.sh line 18:
which_python=`which python`
             ^------------^ SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

Did you mean: 
which_python=$(which python)


In /home/yoh/proj/misc/babs/.testdata/babs_test_project/test_project/analysis/code/check_setup/call_test_job.sh line 20:
echo 'Calling `test_job.py`...'
     ^------------------------^ SC2016 (info): Expressions don't expand in single quotes, use double quotes for that.


In /home/yoh/proj/misc/babs/.testdata/babs_test_project/test_project/analysis/code/check_setup/call_test_job.sh line 21:
${which_python} /home/yoh/proj/misc/babs/.testdata/babs_test_project/test_project/analysis/code/check_setup/test_job.py --path-workspace ${current_pwd} --path-check-setup /home/yoh/proj/misc/babs/.testdata/babs_test_project/test_project/analysis/code/check_setup
                                                                                                                                         ^------------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
${which_python} /home/yoh/proj/misc/babs/.testdata/babs_test_project/test_project/analysis/code/check_setup/test_job.py --path-workspace "${current_pwd}" --path-check-setup /home/yoh/proj/misc/babs/.testdata/babs_test_project/test_project/analysis/code/check_setup

For more information:
  https://www.shellcheck.net/wiki/SC2034 -- path_check_setup appears unused. ...
  https://www.shellcheck.net/wiki/SC2046 -- Quote this to prevent word splitt...
  https://www.shellcheck.net/wiki/SC2016 -- Expressions don't expand in singl...