This object indicates the various system predefined test
suites the on demand job can choose from.
If the value of this object is 'none', this job will run
the tests specified by ceDiagOnDemandJobTestList.
If the value of this object is 'complete', 'minimal',
'nonDisruptive' or 'perPort' the value of
ceDiagOnDemandJobTestList is ignored.