[BUG][GWELLS-2104] Return unique licence numbers

[fergmac]

…eturned unique.

Pull Request Standards

• The title of the PR is accurate
• The title includes the type of change [HOTFIX, FEATURE, etc]
• The PR title includes the ticket number in format of [GWELLS-###]
• Documentation is updated to reflect change [README, functions, team documents]

Description

This PR includes the following proposed change(s):

• To replicate the issue seen in staging and production I have updated the aquifers fixture JSON to include a water rights licence with multiple purposes. Specifically another water rights licence with the same licence number but a different purpose.
• Updated the well list serializer to return only unique licence numbers.

After replicating but before fix:

After bug fix:

[sonarcloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[LocalNewsTV]