Change cucumber_ref default from 'main' to 'master'

Author: srbarrios

jenkins_pipelines/environments/personal/oscar

@@ -6,7 +6,7 @@ node('sumaform-cucumber') {
             disableConcurrentBuilds(),
             parameters([
                     string(name: 'cucumber_gitrepo', defaultValue: 'https://github.com/uyuni-project/uyuni.git', description: 'Testsuite Git Repository'),
-                    string(name: 'cucumber_ref', defaultValue: 'main', description: 'Testsuite Git reference (branch, tag...)'),
+                    string(name: 'cucumber_ref', defaultValue: 'master', description: 'Testsuite Git reference (branch, tag...)'),
                     string(name: 'tf_file', defaultValue: 'susemanager-ci/terracumber_config/tf_files/personal/main_head.tf', description: 'Path to the tf file to be used'),
                     string(name: 'sumaform_gitrepo', defaultValue: 'https://github.com/uyuni-project/sumaform.git', description: 'Sumaform Git Repository'),
                     string(name: 'sumaform_ref', defaultValue: 'master', description: 'Sumaform Git reference (branch, tag...)'),