Epoch Logs Cleanup - Day Epoch Pt. 2

[sampocs]

Closes: #XXX

Context and purpose of the change

Continuing the epoch log cleanup in an effort to make the logs more digestible. This PR addresses the remaing day epoch logs. I'll follow up with the callback logs in a separate PR.

Brief Changelog

• Cleaned up logs for InitiateHostZoneUnbondings
• Fixed logging for sdk.Int types (switched from %d to %v)
• Campfire rule - misc cleanup/standardization across functions (e.g. variable naming)

Author's Checklist

I have...

• Run and PASSED locally all GAIA integration tests
• If the change is contentful, I either:
  • Added a new unit test OR
  • Added test cases to existing unit tests
• OR this change is a trivial rework / code cleanup without any test coverage

If skipped any of the tests above, explain.

Reviewers Checklist

All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.

I have...

• reviewed state machine logic
• reviewed API design and naming
• manually tested (if applicable)
• confirmed the author wrote unit tests for new logic
• reviewed documentation exists and is accurate

Documentation and Release Note

• Does this pull request introduce a new feature or user-facing behavior changes?
• Is a relevant changelog entry added to the Unreleased section in CHANGELOG.md?
• This pull request updates existing proto field values (and require a backend and frontend migration)?
• Does this pull request change existing proto field names (and require a frontend migration)?
  How is the feature or change documented?
  • not applicable
  • jira ticket XXX
  • specification (x/<module>/spec/)
  • README.md
  • not documented

[asalzmann]

lgtm! mind running the integration tests, because lots of core logic was touched?

[sampocs]

lgtm! mind running the integration tests, because lots of core logic was touched?

Yup, ran em all already (i've just been using the checkbox in the readme)