fixup! Web security audit base pipeline

vars/audit.groovy

@@ -87,7 +87,8 @@ def call() {
                         -e W3AF_AUTH_FORM_PASSWORD_FIELD='${params.authFormPasswordField}'
                         """
                         w3afImage.inside(dockerArgs) {
-                            sh 'mkdir reports'
+                            sh 'mkdir -p reports'
+                            sh 'rm -f reports/*'
                             sh 'envtpl -o audit.w3af audit.w3af.tmpl'
                             sh './w3af_console -y -n -s audit.w3af'
                         }