feature(ci): making mandatory to pass code formatting stage

Signed-off-by: Raphael Defosseux <raphael.defosseux@openairinterface.org>

ci-scripts/checkCodingFormattingRules.sh

@@ -205,4 +205,4 @@ echo "Nb Files that do NOT follow OAI rules: $NB_TO_FORMAT over $NB_TOTAL checke
 echo "NB_FILES_FAILING_CHECK=$NB_TO_FORMAT" > ./oai_rules_result.txt
 echo "NB_FILES_CHECKED=$NB_TOTAL" >> ./oai_rules_result.txt
 
-exit 0
+if [ $NB_TO_FORMAT -ne 0 ]; then exit -1; else exit 0; fi

ci-scripts/generateHtmlReport.py

@@ -195,7 +195,7 @@ class HtmlReport():
 					self.file.write('    <strong>All files in repository follow OAI rules. <span class="glyphicon glyphicon-ok-circle"></span> -> (' + nb_total.strip() + ' were checked)</strong>\n')
 				self.file.write('  </div>\n')
 			else:
-				self.file.write('  <div class="alert alert-warning">\n')
+				self.file.write('  <div class="alert alert-danger">\n')
 				if self.git_pull_request:
 					self.file.write('    <strong>' + nb_fail.strip() + ' modified files in Pull-Request DO NOT follow OAI rules. <span class="glyphicon glyphicon-warning-sign"></span> -> (' + nb_total.strip() + ' were checked)</strong>\n')
 				else: