[Feature/Extension] About the term check for 'extension' #2760
Description
What is the issue?
By applying the word checking for "extension" (#2748). We are having issues in the feature branch feature/extensions. It is related to #2671 and some of the authc work, some of the examples are:
Do you have any additional context?
> Task :checkstyleIntegrationTest
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/integrationTest/java/org/opensearch/security/SecurityConfigurationTests.java:218: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/integrationTest/java/org/opensearch/security/SecurityConfigurationTests.java:231: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
> Task :checkstyleIntegrationTest FAILED
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/filter/SecurityRestFilter.java:127: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/securityconf/DynamicConfigModelV7.java:1[93](https://github.com/opensearch-project/security/actions/runs/4940512454/jobs/8834018957#step:5:94): Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/securityconf/DynamicConfigModelV7.java:1[95](https://github.com/opensearch-project/security/actions/runs/4940512454/jobs/8834018957#step:5:96): Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/securityconf/impl/v6/ConfigV6.java:75: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/securityconf/impl/v6/ConfigV6.java:80: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/securityconf/impl/v6/ConfigV6.java:325: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/securityconf/impl/v6/ConfigV6.java:349: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/securityconf/impl/v7/ConfigV7.java:129: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/securityconf/impl/v7/ConfigV7.java:134: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/securityconf/impl/v7/ConfigV7.java:469: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/securityconf/impl/v7/ConfigV7.java:502: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/securityconf/DynamicConfigModel.java:84: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/securityconf/DynamicConfigModelV6.java:193: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]
Error: eckstyle] [ERROR] /home/runner/work/security/security/src/main/java/org/opensearch/security/OpenSearchSecurityPlugin.java:850: Extension should only be used sparingly to keep implementations as generic as possible [RegexpSingleline]