Remove Jenkins bot from AUTHORS.
Remove Jenkins bot from AUTHORS.

swiftstack/swift3-stackforge,tumf/swift3,tumf/swift3,citrix-openstack-build/swift3,citrix-openstack/build-swift3,Zentyal/zentyal-swift-middleware,citrix-openstack/build-swift3,citrix-openstack-build/swift3,KoreaCloudObjectStorage/swift3,Zentyal/zentyal-swift-middleware,stackforge/swift3,swiftstack/swift3-stackforge,KoreaCloudObjectStorage/swift3,stackforge/swift3