Specify Interval for Next Connection

[VictorCavichioli]

Story Description:
The table nodes_sync has the field next_connection, the initial idea of this field is to determine when that node should be managed, and eventually to create the priority, so it's necessary to create a default value to increment that field, it can be based on the repair.interval so we can sync the repair data with the nodes data.

Acceptance Criteria:

• Code designed as described;
• Tests for the new configuration is mandatory.

Definition of Done:

Code approved by maintainers

Notes:

Depends on #672
Related to #652

[VictorCavichioli]

I think configuration could be the same used for the schedule to reload JmxConnection in issue #700

[VictorCavichioli]

PR merged