Refactor : optimize project and code (main).

[misselvexu]

PR Type

Code style update (formatting, local variables).

Describe what this PR does for and how you did.

• Add spring.profiles.default support
• Optimize zuul routing features Auto-Configuration code
• Refactor some code styles

Adding the issue link (#xxx) if possible.

Note

Checklist

• Add copyright holder at the beginning of .class file if it is new.
• Add information of this PR to CHANGELOG.md in root of project.
• All junit tests passing.
• Coverage from Codecov Report should not decrease.

Checklist (Optional)

• Will Pull Request to branch of 2020.0 and 2021.0.
• Add documentation in javadoc in code or comment below the PR if necessary.
• Add your name as @author to the beginning of .class file.

[codecov-commenter]

Codecov Report

Merging #506 (5639cc9) into main (940bfa0) will increase coverage by 0.25%.
The diff coverage is 56.06%.

@@             Coverage Diff              @@
##               main     #506      +/-   ##
============================================
+ Coverage     71.76%   72.02%   +0.25%     
- Complexity      895      896       +1     
============================================
  Files           178      179       +1     
  Lines          3400     3392       -8     
  Branches        420      417       -3     
============================================
+ Hits           2440     2443       +3     
+ Misses          747      737      -10     
+ Partials        213      212       -1     

Impacted Files	Coverage Δ
...data/config/MetadataTransferAutoConfiguration.java	100.00% <ø> (ø)
...polaris/config/PolarisConfigAutoConfiguration.java	90.00% <ø> (ø)
...onfig/PolarisConfigBootstrapAutoConfiguration.java	85.71% <ø> (ø)
...ig/adapter/PolarisConfigPropertyAutoRefresher.java	86.48% <ø> (ø)
...config/adapter/PolarisConfigPropertyRefresher.java	0.00% <0.00%> (ø)
...arisRefreshContextConfigPropertyAutoRefresher.java	60.00% <ø> (+10.00%)	⬆️
.../adapter/SmartConfigurationPropertiesRebinder.java	0.00% <0.00%> (ø)
.../config/condition/NonDefaultBehaviorCondition.java	66.66% <ø> (ø)
...t/cloud/polaris/config/config/ConfigFileGroup.java	87.50% <ø> (ø)
...polaris/config/config/PolarisConfigProperties.java	43.47% <ø> (ø)
... and 36 more

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