Backend [Integration Test] tribes.go handlers GetTribesByOwner, GetTribesByAppUrl, & GetTribe

[AbdulWahab3181]

Describe your changes

Added Unit test for tribes handler to test GetTribesByOwner, GetTribesByAppUrl and GetTribe methods

Issue ticket number and link

Closes #1528

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist before requesting a review

• I have performed a self-review of my code
• I have tested on Chrome and Firefox
• I have tested on a mobile device
• I have provided a screenshot or recording of changes in my PR if there were updates to the frontend

[ecurrencyhodler]

Paid 200k! https://community.sphinx.chat/bounty/1528