oslo.db: don't run SQLAlchemy 0.8.x job for master
oslo.db: don't run SQLAlchemy 0.8.x job for master

Not needed after I2f13918c169071d4365c689bdb709a04064279fa. It will
still be run for changes to stable/juno.

Change-Id: I9aabfb02a65aa16064c0058d9cd8fb609cc52db6

coolsvap/project-config,openstack-infra/project-config,open-switch/infra_project-config,openstack-infra/project-config,Tesora/tesora-project-config,open-switch/infra_project-config,coolsvap/project-config,citrix-openstack/project-config,anbangr/osci-project-config,dongwenjuan/project-config,noorul/os-project-config,anbangr/osci-project-config,Tesora/tesora-project-config,noorul/os-project-config,dongwenjuan/project-config,citrix-openstack/project-config