fix(fixtures): correctly encode secrets in base64 (#131)

[mdonadoni]

Closes reanahub/reana-commons#455

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 5.16%. Comparing base (9477298) to head (7dd1b14).
Report is 8 commits behind head on master.

Files with missing lines	Patch %	Lines
pytest_reana/fixtures.py	0.00%	4 Missing ⚠️
pytest_reana/version.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #131      +/-   ##
=========================================
- Coverage    5.18%   5.16%   -0.03%     
=========================================
  Files           5       5              
  Lines         212     213       +1     
=========================================
  Hits           11      11              
- Misses        201     202       +1     

Files with missing lines	Coverage Δ
pytest_reana/version.py	0.00% <0.00%> (ø)
pytest_reana/fixtures.py	3.70% <0.00%> (-0.02%)	⬇️

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[tiborsimko]

Release news suggestion (to indicate that the PR properly encodes all secrets now):

fix(fixtures): encode all user secrets in base64 (#131)