add examples as integration tests #1529

Job	Run time
test-getting_started / tests	1m 58s
test-tutorials (configuration.ipynb) / tests	1m 35s
test-tutorials (describing_tasks.ipynb) / tests	2m 36s
test-tutorials (debugging.ipynb) / tests	1m 55s
test-tutorials (multiple_pilots.ipynb) / tests	2m 32s
test-tutorials (profiling.ipynb) / tests	1m 56s
test-tutorials (raptor.ipynb) / tests	2m 4s
test-tutorials (raptor_mpi.ipynb) / tests	4m 53s
test-tutorials (staging_data.ipynb) / tests	2m 0s
test-tutorials (submission.ipynb) / tests	1m 29s
	22m 58s

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