v2.6.1
* change WorkflowDef default schema version to 2 * add a check for workflowDef schema version to be always 2 * change WorkflowDef default schema version to 2 * add a check for workflowDef schema version to be always 2 * updated test
* change WorkflowDef default schema version to 2 * add a check for workflowDef schema version to be always 2 * change WorkflowDef default schema version to 2 * add a check for workflowDef schema version to be always 2 * updated test