HUE-1656 [oozie] Create empty SLA on new nodes

Second node will use the same values for now.
HUE-1656 [oozie] Create Coordinator SLA
HUE-1656 [oozie] Add 2 new SLA fields
HUE-1656 [oozie] Adding parameters to SLA
HUE-1657 [oozie] Basic SLA parsing for workflows

Bump workflows to 0.5
SLA fields are not imported yet