Go through and validate test data

[Aratz]

Make sure our test data is good enough and remove the following todos:

seqinspector/conf/test.config

Lines 26 to 27 in 487f081

	// TODO nf-core: Specify the paths to your test data on nf-core/test-datasets
	// TODO nf-core: Give any required params for the test so that command line flags are not needed

[FranBonath]

handled in PR #108