Correct logging for missing workers configuration
Correct logging for missing workers configuration

Summary: Logging statement for workers talks says coordinator.  This fixes it.

Test Plan: make test

Reviewers: cwallin, anu

Reviewed By: anu

Differential Revision: https://phabricator.td.teradata.com/D803

prestodb/presto-admin,Svjard/presto-admin,prestodb/presto-admin,Svjard/presto-admin