Make JobStepCreator fields more consistent through the api

[MDeLuise]

Brief description of the PR.
This PR makes the jobStepProperties more consistent through the api.

Related Issue
This PR fixes #3580.

Description of the solution adopted
Before the changes the following were the getter and setter methods of the JobStepCreator

• getStepProperties
• setJobStepProperties

After the changes the getter and setter methods of the JobStepCreator are:

• getStepProperties
• setStepProperties: to use instead of the old setJobStepProperties
• setJobStepProperties: deprecated, left there only to ensure backward compatibility
• getJobStepPropertiesDeprecated: deprecated, left there only to ensure backward compatibility
• setJobStepPropertiesDeprecated: deprecated, left there only to ensure backward compatibility

Any side note on the changes made

• In a future release the deprecated methods will be removed
• Until the removal of the deprecated methods, the Swagger UI example of JobStepCreator will be the following:

  {
    "type": "jobStepCreator",
    "name": "Step 1",
    "description": "A step with a description",
    "stepIndex": 0,
    "jobStepDefinitionId": "Aw",
    "stepProperties": [
      {
        "name": "bundleId",
        "propertyType": "java.lang.String",
        "propertyValue": "999"
      }
    ],
    "jobStepProperties": [
      {
        "name": "bundleId",
        "propertyType": "java.lang.String",
        "propertyValue": "999"
      }
    ]
  }
  

  Both stepProperties and jobStepProperties will be present and functional, even if the latter is deprecated.

[codecov]

Codecov Report

Merging #3759 (f90f4a3) into develop (32bf96a) will increase coverage by 2.27%.
The diff coverage is 40.00%.

❗ Current head f90f4a3 differs from pull request most recent head 5935bd5. Consider uploading reports for the commit 5935bd5 to get more accurate results

@@              Coverage Diff              @@
##             develop    #3759      +/-   ##
=============================================
+ Coverage      50.04%   52.32%   +2.27%     
  Complexity        26       26              
=============================================
  Files           1864     1865       +1     
  Lines          35264    35269       +5     
  Branches        2784     2784              
=============================================
+ Hits           17649    18453     +804     
+ Misses         16708    15852     -856     
- Partials         907      964      +57     

Impacted Files	Coverage Δ
.../service/job/step/internal/JobStepCreatorImpl.java	87.50% <ø> (ø)
...eclipse/kapua/service/job/step/JobStepCreator.java	40.00% <40.00%> (ø)

... and 76 files with indirect coverage changes