Added support for dumping public key generated using Cert's private key
to all nodes in the slice.
This was a work around for slices created using Omni which does not load this
public key onto machines. The requirement here is that inorder to use the genidesktop
the user will have to atleast run the gdesktop-init script form the User Workspace and then
could use the genidesktop to instrumentize if they wanted to.