Steps to reproduce:
1. create 2 liferay tomcat runtimes
2. create 1 liferay tomcat server
3. open the server config and try to change the runtime to the 2nd liferay runtime
4.click close config page , will see the popout "save resource" dialog. Click "No"
5.open the server config page again , check runtime environment
Runtime base dir now has been changed to the 2nd server dir