Add sleep_interval for checking completed pipeline

What does this MR do?

Add sleep_interval since the runner logs were printing excessively, resulting in a runner failure.

This value defaults to 0.1, meaning that:

D, [2020-04-04T03:16:14.420557 #24] DEBUG -- : finding :status_badge with args {}
D, [2020-04-04T03:16:14.452124 #24] DEBUG -- : found :status_badge

... two lines would print every tenth of a second meaning that when a pipeline had run past a specific time, the runner would fail with:

Job's log exceeded limit of 4194304 bytes.

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content