Yes. Adding it through the Admin Console works.
But, the issue is, we should provide a default context-root in the WAR.
It would be good if I could provide through ibm-web-ext.xml, but not sure whats going wrong.
I realized, I may need to add "<webApp href="WEB-INF/web.xml#name"/>", and added as below.
Still, no luck.
When the <name> contained spaces WAS threw up some error ("could not mark ibm-web-ext.xml.. blah"), but when I gave the name with out any space, that error didn't come. But, the context-root was not recognized