Review Improvements for repository modernizer tool

[dichaudhary]

Description

The PR contains changes for :

1. aem.sdk.api version should be fetched from parent.
2. plugins used across should have version fetched from reactor pom for other poms.

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] I have signed the Adobe Open Source CLA.
• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[codecov[bot]]

Codecov Report

Merging #47 (3a35b33) into master (c444e25) will decrease coverage by 0.00%. The diff coverage is 100.00%.

:exclamation: Current head 3a35b33 differs from pull request most recent head 2491882. Consider uploading reports for the commit 2491882 to get more accurate results

@@            Coverage Diff             @@
##           master      #47      +/-   ##
==========================================
- Coverage   90.12%   90.11%   -0.01%     
==========================================
  Files          16       16              
  Lines        1600     1599       -1     
  Branches      173      173              
==========================================
- Hits         1442     1441       -1     
  Misses        151      151              
  Partials        7        7              

Impacted Files	Coverage Δ
...ckages/repository-modernizer/src/util/constants.js	100.00% <ø> (ø)
...kages/repository-modernizer/src/restructure-pom.js	89.72% <100.00%> (-0.05%)	:arrow_down:

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