Update lockable-resources-jenkins plugin
Update lockable-resources-jenkins plugin

This might fix the bundle install deadlocks that we've seen today
because the 1.11.2 release fixes a resource lock issue:

https://wiki.jenkins-ci.org/display/JENKINS/Lockable+Resources+Plugin

https://issues.jenkins-ci.org/browse/JENKINS-40368

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet