refactor(follower): use normal feed for one-off changes

[eiri]

PR summary

Use normal feed mode for changes follower one-off FINITE mode.

Fixes: s1115 / i445

Note: An existing issue is required before opening a PR.

PR Checklist

Please make sure that your PR fulfills the following requirements:

• The commit message follows the
  Angular Commit Message Guidelines.
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• New tests
• Build/CI related changes
• Documentation content changes
• Other (please describe) - performance improvement

What is the current behavior?

Currently the changes follower uses longpoll feed type is for both start (LISTEN) and start_one_off (FINITE) cases.

What is the new behavior?

Switch to use the normal feed type for start_one_off (FINITE) mode to avoid waiting unnecessarily till timeout on empty feeds.

Does this PR introduce a breaking change?

• Yes
• No

Other information