Applicant site fixes

[michaelseyo]

Description

1. When the applicant accepts the role offered, it will turn the role: 'Applicant' attribute into the role which is accepted, and also the department of the accepted role.
2. Under the recruitment tab, the director will be able to view all the members that belong to the department. This includes search and filter by role functionality

Fixes # (issue)

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:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules