FINERACT-2165: Use "Fineract-client-feign" in integration tests

[edk12564]

JIRA: FINERACT-2165

Changes

CurrenciesTest utilized the low level RestAssured client and JUnit. According to the guidelines in the Fineract community and similar tests in the codebase, I replaced these tests with equivalent tests in Feign Client, Cucumber and Gherkin. More details below.

• Eliminated old CurrenciesTest, CurrenciesHelper, and CurrencyDomain due to implementing RestAssured client and JUnit
• Created test steps with Feign Client and feature file with Gherkin that covers same test cases as old tests but now located in E2E-core and E2E-runner and updated tooling.
• Updated ErrorMessageHelper to handle Currency error logging.
• Fixed bug in CenterDomain.java that was causing compilation issues. CurrenciesDomain was improperly being imported and not used anywhere.

Results

Tests pass with the latest version of the codebase.

After a clean build, grep shows no project files with references to CurrenciesTest, CurrenciesHelper, or CurrencyDomain.

Checklist

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