Fix monitor addresses in rgw.conf

[UtkarshBhatthere]

Description

Fixes incomplete monitor address population for RGW configuration file.

Fixes #359

Type of change

Please delete options that are not relevant.

• [x] 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)
• [ ] CleanCode (Code refactor, test updates, does not introduce functional changes)
• [ ] Documentation update (Doc only change)

How Has This Been Tested?

strengthened the unit tests

Contributor's Checklist

Please check that you have:

• [x] self-reviewed the code in this PR.
• [ ] added code comments, particularly in hard-to-understand areas.
• [ ] updated the user documentation with corresponding changes.
• [x] added tests to verify effectiveness of this change.

[hemanthnakkina]

@UtkarshBhatthere Can you confirm if rgw conf gets updated on adding new mon?

[UtkarshBhatthere]

hey @hemanthnakkina fwir it currently doesn't. The foreever updating logic only does the ceph.conf file.