Fix bug with incorrect name for sequential in execution-strategy JJB uses 'sequential' instead of run-sequentially.
Fix bug with incorrect name for sequential in execution-strategy
JJB uses 'sequential' instead of run-sequentially.

See https://git.openstack.org/cgit/openstack-infra/jenkins-job-builder/tree/jenkins_jobs/modules/project_matrix.py#n52

ktdreyer/jenkins-job-wrecker,skybet/jenkins-job-wrecker