accept validations.yml without tests and validations, to simply run and log trace

src/mpIterator.py

@@ -62,6 +62,7 @@ for test_name in [name for name in os.listdir(tests_dir) if os.path.isdir(os.pat
 	# Run validations
 	with open(validation_file, 'r') as f:
 		validations = load(f)
+	if validations!=None:
 		for k in validations.keys():
 			# Identify checker class
 			name = k.title().replace("_","")+"Checker"

src/mpValidations.py

@@ -141,6 +141,7 @@ class Checker:
 	def check(self):
 		is_ok = True
 		self.logs=self.test_id+"\n"
+		if self.yml!=None:
 			for test in self.yml:
 				name=test["test"].title().replace("_","")+"Test"
 				klass = globals()[name]