FINERACT-1474: Remove hard-coded constants from ExternalCreditBureauTest

[debcodes076]

Description

This PR addresses Issue 1474 by refactoring the ExternalCreditBureauIntegrationWritePlatformServiceImplTest.java file and its implementation to remove hard-coded strings and magic numbers.

Changes Made

• Vendor Neutrality: Renamed service and test classes to be neutral (e.g., ExternalCreditBureauIntegrationWritePlatformService).
• Code Quality: Introduced private static final constants for CREDIT_BUREAU_ID, TEST_USERNAME, TEST_PASSWORD, and TEST_URL.
• Logic Update: Refactored the setup() method and all @Test cases to utilize these constants.
• Cascading Fixes: Updated dependent services (e.g., CreditReportWritePlatformServiceImpl) to align with the new neutral interface.

Verification & Compliance

• Local Tests: Ran ./gradlew :fineract-provider:test --tests "org.apache.fineract.infrastructure.creditbureau.service.ExternalCreditBureauIntegrationWritePlatformServiceImplTest" → BUILD SUCCESSFUL.
• Formatting: Applied project-wide styles via ./gradlew spotlessApply.
• Audit: Verified license compliance via ./gradlew rat → PASSING.

---

Checklist

• Write the commit message as per guidelines
• Acknowledge that the build passes locally
• Follow coding conventions

GSoC 2026 Context:

This contribution is intended as evidence of competence for GSoC 2026.
Tag: gsoc-fineract-evidence

[IOhacker]

Hello, "ThitsaWorks" seems to be non neutral, it must be removed or replaced.

[debcodes076]

Hello, "ThitsaWorks" seems to be non neutral, it must be removed or replaced.

thank you for the feedback! i've refactored the code to replace all "Thitsaworks.." references with "ExternalCredit..." (including file name, classnames, method names) to ensure vendor neutrality.

[airajena]

please make sure you run ./gradlew spotlessApply spotbugsMain spotbugsTest checkstyleMain checkstyleTest as pre commit

[debcodes076]

please make sure you run ./gradlew spotlessApply spotbugsMain spotbugsTest checkstyleMain checkstyleTest as pre commit

i did ran this, and came up with few failed test cases, specifically e2e , fixed them and saw "BUILD SUCCESS" now i've push commited again.
thank you for the tip!