context creation in periodic task to execute workbook
context creation in periodic task to execute workbook

Change-Id: I26134a6f83a44abde839576daada9e0de793fdc6

openstack/mistral,openstack/mistral,TimurNurlygayanov/mistral,dennybaa/mistral,StackStorm/mistral,StackStorm/mistral,dennybaa/mistral,dzimine/mistral