3461 duplicated script names

[hiker]

Fixes #3461.

[hiker]

I've fixed the unit test failures by slightly changing the test (instead of setting sys.path, I chdir into the script directory).

We do get additional failure in example, since without modifying sys.path, helper scripts in the same directory as the psyclone scripts are NOT found anymore (unless you set PYTHONPATH=.). We could still modify sys.path in generator.py to accommodate that use case, I have started the CI to see if nemo/lfric relies on this.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.99%. Comparing base (2d08da6) to head (ab86dd3).

❌ Your project check has failed because you have indirect coverage changes. Learn more about Unexpected Coverage Changes and reasons for indirect coverage changes.

Additional details and impacted files

@@             Coverage Diff             @@
##            master    #3468      +/-   ##
===========================================
- Coverage   100.00%   99.99%   -0.01%     
===========================================
  Files          395      395              
  Lines        55199    55205       +6     
===========================================
+ Hits         55199    55204       +5     
- Misses           0        1       +1     

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[hiker]

Failures in one example and nemo (lfric is fine) indicate that we should modify sys.path when importing and executing a script (so that helper scripts in the same directory as the script are found). That was done in ab86dd3, so once I've updated the documentation this should be ready to go.