Bump down service-runner to 1.3.1
Bump down service-runner to 1.3.1

There seems to be a regression and/or incompatibility between
service-runner v2 and service-template-node-based services, so bump down
the version to 1.3.1 for the time being.

Change-Id: Id0ebc39780dbdf48f6bce8a23b22b377ba7ddaf0

wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps