Cleanup Spring Dependencies

[siri-varma]

Description

• I think having all the versions defined in the parent pom is a good idea.
• Moved the versions for testcontainer-module and spring-boot-example to parent pom. Depending on the feedback from this PR will work on rest of the modules in later prs.

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: #940

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[salaboy]

@siri-varma I've left some comments .. I do recommend not having the springframework.version managed in this way.. it will make it really hard to maintain.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.42%. Comparing base (d759c53) to head (f233c8c).
Report is 138 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1334      +/-   ##
============================================
+ Coverage     76.91%   77.42%   +0.50%     
- Complexity     1592     1764     +172     
============================================
  Files           145      204      +59     
  Lines          4843     5368     +525     
  Branches        562      587      +25     
============================================
+ Hits           3725     4156     +431     
- Misses          821      899      +78     
- Partials        297      313      +16     

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