N1kv: Update profile create, cleanup file rm, and add features

The profile create CLI command now requires a --physical_network
attribute (added for initial network create).

When cleaning up old VSM images, need -f option for rm, otherwise
stack.sh hangs, prompting for confirmation of the regular file
deletion.

For the N1kv to respond to requests, http-server and segmentation
features need to be enabled at install configuration. Added the
needed Expect script lines.