Fixes many test files containing typos in variable names or unused variables.

Nicolas Tancogne-Dejeanrequested to merge
fix_tests_unused into develop

Description

Fixes many test files containing typos in variable names or unused variables.

Closes #314 (closed) .

News snippet

Fixes many test files containing typos in variable names or unused variables.

Checklist

  • I have checked that my code follows the Octopus coding standards
  • I have added tests for all the new features added in this request.
Edited by Martin Lueders

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