Fix: handle default attribute in case it's not proc

[imadbourouche]

Context

• Fix for: Default attributes from yaml file is not working #70

Solution

The solution consiste on first check the value if it's proc/lambda. If it's the case we proceed to do value.call(self) otherwise we send the value as it is.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.46%. Comparing base (3f8b1f0) to head (1e98cfd).
Report is 23 commits behind head on development.

Additional details and impacted files

@@               Coverage Diff               @@
##           development      #71      +/-   ##
===============================================
+ Coverage        86.35%   86.46%   +0.11%     
===============================================
  Files               46       46              
  Lines             3027     3067      +40     
===============================================
+ Hits              2614     2652      +38     
- Misses             413      415       +2     

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[syphax-bouazzouni]

need to add a unit test for this, in this file https://github.com/ontoportal-lirmm/goo/blob/master/test/test_dsl_settings.rb#L51

[imadbourouche]

The test are passing @syphax-bouazzouni