Add diagnostics for summary plugin usage without a reporter. Closes #177#201

garrytrinder merged 2 commits intomaindev-proxy-tools/toolkit:mainfrom

177-warn-when-the-config-contains-a-summary-plugin-without-a-reporterdev-proxy-tools/toolkit:177-warn-when-the-config-contains-a-summary-plugin-without-a-reporterCopy head branch name to clipboard