Updated the Jenkinsfile to merge in next/5.1 instead of master
Updated the Jenkinsfile to merge in next/5.1 instead of master

FernCreek/tinymce,TeamupCom/tinymce,FernCreek/tinymce,tinymce/tinymce,tinymce/tinymce,TeamupCom/tinymce,tinymce/tinymce,FernCreek/tinymce