Fix getResourceAccessor logic to avoid setting changeLogDirectory when searchPath has already set

[MalloD12]

Impact

• Bug fix (non-breaking change which fixes expected existing functionality)
• Enhancement/New feature (adds functionality without impacting existing logic)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

Fixes #3282

Things to be aware of

• Maven was conflicting to find changelog file in two different paths, so this fix avoid setting a new location if there is one already defined.
• Only impacts Maven.

Things to worry about

• Nothing

Additional Context

• Nothing

[github-actions]

Unit Test Results

  4 680 files  +12    4 680 suites  +12   36m 15s ⏱️ -3s
  4 643 tests +  2    4 417 ✔️ +  2     226 💤 ±0  0 ❌ ±0 
54 720 runs  +24  49 657 ✔️ +24  5 063 💤 ±0  0 ❌ ±0 

Results for commit 64dedfe. ± Comparison against base commit 00ee3f9.

♻️ This comment has been updated with latest results.

[nvoxland]

Changes look good to me

[XDelphiGrl]

This PR addresses a bug where Liquibase Maven disregarded the changeLogDirectory property, resulting in the unexpected location of two changelog files (one in src, the other in target). Now Liquibase will look for a changelog only within the specified changeLogDirectory.

• New unit tests added.
• No additional testing required.

APPROVED