Bug 1079546 - Postgres Plugin - Postgres.Inventory.ChildHistory - Past N Days Filter Appears To Hang With Empty Value

Use DateFilterItem instead of "Past N days" SpinnerItem
Use Countdownlatch instead of nested GWT async service calls
Handle parse error and null dates
Bug 1073991 - Create Child resource with User Type for postgres server doesn't work correct

Resource name is a mandatory property of the Create Resource Report