Fixed workdir of wrapped deployments

[LanderOtto]

This commit fixes the inheritance mechanism for the workdir property of wrapped deployments. In the case where the wrapped deployment has not defined a workdir, but its wrapper deployment does, the first inherits from the second.

Moreover, the _inner_deploy method of the DefaultDeploymentManager class now injects the workdir into the DeploymentConfig of the inner connector. The previous behaviour did not lead to errors, but it was corrected to avoid future ones.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.14%. Comparing base (9a698de) to head (d961bc5).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #461   +/-   ##
=======================================
  Coverage   70.14%   70.14%           
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  Files          83       83           
  Lines       10591    10591           
  Branches     2508     2508           
=======================================
  Hits         7429     7429           
+ Misses       2709     2703    -6     
- Partials      453      459    +6     

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