fix invalid literal data numerics conversion and validation between WPS/OAS/CWL representations

[fmigneault]

Fixes

• Fix broken OpenAPI schema link references to OGC API - Processes repository.
• Fix WPS I/O integer literal data conversion to OpenAPI I/O schema definition injecting an
  invalid format: double property due to type checking with float succeeding against int values.
• Fix CWL I/O value validation for enum-like definitions from corresponding OpenAPI and WPS I/O.
  Since CWL I/O do not allow Enum type for values other than basic string type, valueFrom attribute is
  used to handle int, float and bool types, using an embedded JavaScript validation against allowed values.
  Because of this validation strategy, CWL packages must now include InlineJavascriptRequirement when allowed
  values for these basic types must be performed in order for the CWL engine to parse I/O contents of valueFrom
  (relates to CWL Enum using numerics ? common-workflow-language/cwl-v1.2#267, input value restrictions / validations common-workflow-language/common-workflow-language#764 and How to specify lower and upper bound for type array in WorkflowInputParameter common-workflow-language/common-workflow-language#907).
• Fix typing definitions for certain Literal references for proper resolution involving values stored in constants.

To Do

• apply InlineJavascriptRequirement automatically if missing when valueFrom is added for input validation of numerics
• add tests to validate conversion from WPS -> CWL
• add tests running CWL with invalid int/float/bool/other values against input generated with valueFrom validation

[codecov]

Codecov Report

Merging #558 (abe66fe) into master (dd99a64) will increase coverage by 0.02%.
The diff coverage is 92.10%.

@@            Coverage Diff             @@
##           master     #558      +/-   ##
==========================================
+ Coverage   84.43%   84.45%   +0.02%     
==========================================
  Files          79       79              
  Lines       17641    17702      +61     
  Branches     2675     2685      +10     
==========================================
+ Hits        14895    14951      +56     
- Misses       2019     2022       +3     
- Partials      727      729       +2     

Files Changed	Coverage Δ
weaver/processes/convert.py	84.18% <86.15%> (+0.10%)	⬆️
weaver/database/base.py	85.71% <100.00%> (ø)
weaver/processes/constants.py	100.00% <100.00%> (ø)
weaver/processes/wps_package.py	84.05% <100.00%> (ø)
weaver/processes/wps_testing.py	88.00% <100.00%> (ø)
weaver/store/base.py	100.00% <100.00%> (ø)
weaver/wps_restapi/swagger_definitions.py	99.82% <100.00%> (ø)