unlink a component does not work

[mohitsuman]

If 2 components are linked together and then the user tries to unlink the component, it fails.
It needs a port entry to perform successful unlink.

[sudhirverma]

@mohitsuman

I linked the component together for e.g:

I linked comp1 to comp2 `comp1 -> comp2` 
and then
linked comp2 to comp1 `comp2 -> comp1` 

when I unlink the comp1 and comp2 it successfully unlink both the component.

[mohitsuman]

@sudhirverma Try it for components which has multiple ports. e.g.
comp1 : https://github.com/mohitsuman/nodejs-ex
comp2: https://github.com/openshift-evangelists/Wild-West-Backend