Adding list of schema classes when one not found

And relabling keys to match way linkml renables them in case of non standard names.  But note linkml does not take () parentheses out, and does not change capitalization.

script/dh-validate.py

@@ -123,7 +123,7 @@ def getTargetClass(SCHEMA, target_class, slot_key = None):
 		templates[name] = class_obj;
 
 	if target_class and not target_class in templates:
-		exit("The given validation target class [" + target_class + "] was not found in schema!");
+		exit("The given validation target class [" + target_class + "] was not found in schema! Schema has: " + str([key for key in templates.keys()]) );
 
 	# So far many DH schemas only have one class so only possibility is to validate against that:
 	if not target_class:
@@ -418,6 +418,17 @@ def getLinkMLTransform(SCHEMA, template, row_data):
 
 			if slot['multivalued'] == True:
 				output_val = [x.strip() for x in re.split(DELIMITERS, output_val)];
+
+			# If key isn't in snake_case, then convert it to that, since 
+			# linkml-validate insists on that:
+			# ISSUE: () preserved rather than eliminated
+			# ISSUE: diagnostic pcr Ct value 1 not transformed to diagnostic_pcr_ct_value_1
+			# ISSUE: geo_loc_name_(state_province_territory) not transformed to geo_loc_name_(state_province_territory)
+			# ISSUE: NML submitted specimen type not transformed to nml_submitted_specimen_type
+			# ISSUE: specimen collector sample ID not transformed to specimen_collector_sample_id 
+
+			# This relabling of key helps
+			key = re.sub("[-]","",re.sub("[ /]","_", key)); #LinkML doesn't convert to lowercase
 			data[key] = output_val;
 
 	return data;