Constraints on task execution, e.g. a execution group, allowed/disallowed nodes, etc. EXPERIMENTAL.

Item Summary
Name	Type	Multiplicity	Description
group	property string	[0,1]	A group this task is a part of.
groupTaskLimit	property int	[0,1]	Number of tasks within the group that can be executed at once (clusterwide).
secondaryGroup	container TaskExecutionGroupConstraintType	[0,-1]	TODO
allowedNode	property string	[0,-1]	Node(s) that this task is allowed to be executed on.
disallowedNode	property string	[0,-1]	Node(s) that this task is not allowed to be executed on.
retryAfter	property duration	[0,1]	In what time to retry after clusterwide execution constraints are not met.

Items
- group
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  A group this task is a part of. In the future, task execution groups will probably have more complex parameters. But for now, their only parameter is the (clusterwide) member tasks limit. They are also referenced from NodeType when specifying execution limitations for them.
- groupTaskLimit
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  Number of tasks within the group that can be executed at once (clusterwide). Default is "unlimited". This parameter will be moved into separate task group object in a later version of midPoint.
- secondaryGroup
  
  Flags: RAM,runtime
  
  Multiplicity: [0,-1]
  
  TODO
- allowedNode
  
  Flags: RAM,runtime
  
  Multiplicity: [0,-1]
  
  Node(s) that this task is allowed to be executed on. If not specified, the task is allowed to be executed on any cluster node (if not restricted by disallowedNode item). DEPRECATED and UNUSED. Use NodeType.taskExecutionLimitations instead.
- disallowedNode
  
  Flags: RAM,runtime
  
  Multiplicity: [0,-1]
  
  Node(s) that this task is not allowed to be executed on. DEPRECATED and UNUSED. Use NodeType.taskExecutionLimitations instead.
- retryAfter
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  In what time to retry after clusterwide execution constraints are not met. The default is 1 minute.