Add options to copy and apply resource

[Kyrremann]

Thanks for the reply. --copy is for cloning an object, same fields except for the name, which is the string passed to --copy. Maybe the subsequent apply can be done automatically so then these can be done:

# clone pod "mypod" with same spec to a new pod named "mypod2"
kubectl eksporter pod mypod --drop field1 --copy=mypod2
# similar to above but to namespace "namespace2"
kubectl eksporter pod mypod --drop field1 --copy=namespace2/mypod2

Originally posted by @asherlporetz in #8 (comment)