fix: use String.replace() instead of replaceFirst() in createBaseURL

[Vinu2111]

Fixes #1838

What

createBaseURL in Service.java used String.replaceFirst() to swap test URLs
for live URLs. Since replaceFirst() accepts a regex pattern, dots in the URL
strings (e.g. pal-test.adyen.com) were treated as wildcards — matching any
character instead of a literal dot.

Fix

Replaced the affected replaceFirst() calls with String.replace(), which does
plain literal string matching. No regex involved, no wildcard risk.

The following blocks were updated:

• pal- block
• checkout- block (both the /possdk/ branch and the standard branch)
• device-api- block (both EU and non-EU branches)

The two calls without dots (-live → -test and -test → -live) were
intentionally left as replaceFirst() since they are not affected by this issue.

Test

Added testLivePalUrlOnlyMatchesLiteralDots() to ServiceTest.java to verify
that a URL resembling a pal endpoint but without literal dots is not incorrectly
transformed by the pal- block.

[gemini-code-assist]

Code Review

This pull request replaces replaceFirst with replace in Service.java to ensure literal matching of URLs containing dots, and adds a corresponding unit test. The review feedback suggests extending this change to the authe block for consistency and improving the test case to accurately verify that dots are not treated as regex wildcards.

[jeandersonbc]

Hi @Vinu2111, changes look good! I considered asking to update the PR to use .replace across the other places in createBaseURL for consistency but I don't think it's necessary and it's unknown whether this would create some issue. I'm approving the PR as-is. Thanks for the contribution!

[jeandersonbc]

@Vinu2111 could you please run mvn spotless:apply and update the branch? We recently enforced code formatting on PRs and it's currently blocking your changes.

[Vinu2111]

Hi @jeandersonbc, thanks for the review! I've run mvn spotless:apply and pushed the formatting fix. Should be good to go now.