Test harness for advanced Composed Task scenarios

[Sabby Anandan]

The goal is to increase the coverage from 3 -> 50!

• testFailedGraph failedStep && AAA
• testEmbeddedFailedGraph AAA && failedStep && BBB
• testSequential AAA && BBB && CCC
• splitTest <AAA||BBB||CCC>
• nestedSplit <<AAA || BBB > && CCC || DDD>
• twoSplitTest <AAA||BBB||CCC> && <DDD||EEE>
• testSequentialAndSplit AAA && <BBB||CCC||DDD> && EEE
• testSequentialTransitionAndSplit AAA && FFF 'FAILED' -> EEE && <BBB||CCC> && DDD
• testSequentialTransitionAndSplitFailedInvalid AAA && failedStep 'FAILED' -> EEE && FFF && <BBB||CCC> && DDD should fail
• testSequentialAndFailedSplit AAA && <BBB||failedStep||DDD> && EEE
• testSequentialAndSplitWithFlow AAA && <BBB && FFF||CCC||DDD> && EEE
• testFailedBasicTransition failedStep 'FAILED' -> AAA * -> BBB
• testSuccessBasicTransition AAA 'FAILED' -> BBB * -> CCC
• testSuccessBasicTransitionWithTransition AAA 'FAILED' -> BBB && CCC 'FAILED' -> DDD '*' -> EEE
• testSequenceFollowedBySuccessBasicTransitionSequence DDD && AAA 'FAILED' -> BBB * -> CCC && EEE should fail
• testWildCardOnlyInLastPosition AAA 'FAILED' -> BBB && CCC * -> DDD
• testFailedGraphRetry: failedStep && AAA run execution, retry execution in which it will upon 2nd try failedStep succeeds.
• testEmbeddedFailedGraph AAA && failedStep && BBB run execution, retry execution in which it will upon 2nd try failedStep succeeds.
• testSequentialAndFailedSplitRetry AAA && <BBB||failedStep||DDD> && EEE run execution, retry execution in which it will upon 2nd try failedStep succeeds.
• testSequentialRetry AAA && BBB && CCC run execution, retry execution in which it will upon 2nd try it will fails.
• pass CTR properties with invalid values. unaccessible urls for hosts, negative numbers for threads etc.

[Glenn Renfro]

Linking this issue to spring-cloud/spring-cloud-dataflow-samples#140. This issue's result will provide a task batch application that will allow users to test Composed Tasks, task, and batch failures.