functional tests

[fmigneault]

• add support for workflows ScatterFeatureRequirement (fixes Support Fan-In/Fan-Out workflow process execution #105)
• add func workflow tests (relates to functional tests for process deployment #11)
• change OGC Media-Types format for CWL

[codecov]

Codecov Report

Merging #462 (96ab10e) into master (1fa0ecb) will increase coverage by 0.09%.
The diff coverage is 86.66%.

@@            Coverage Diff             @@
##           master     #462      +/-   ##
==========================================
+ Coverage   82.33%   82.42%   +0.09%     
==========================================
  Files          76       76              
  Lines       15574    15563      -11     
  Branches     3389     3372      -17     
==========================================
+ Hits        12823    12828       +5     
+ Misses       1999     1989      -10     
+ Partials      752      746       -6     

Impacted Files	Coverage Δ
weaver/processes/constants.py	100.00% <ø> (ø)
weaver/processes/wps3_process.py	59.66% <66.66%> (ø)
weaver/processes/wps_workflow.py	51.71% <80.00%> (ø)
weaver/processes/wps_package.py	78.03% <85.00%> (+1.82%)	⬆️
weaver/processes/builtin/jsonarray2netcdf.py	56.09% <85.71%> (+2.25%)	⬆️
weaver/formats.py	87.98% <100.00%> (-0.39%)	⬇️
weaver/processes/utils.py	79.50% <0.00%> (-0.42%)	⬇️

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