check mode in ssh target support: "Cat file to register" will fail

[pcahyna]

"Create key" should IMO not have check_mode: False, because it changes the managed host, and one should not do that in check mode. The problem then is that "Cat file to register" will fail, so this is not that easy to fix.

Originally posted by @pcahyna in https://github.com/linux-system-roles/kdump/pull/23/review_comment/create

[pcahyna]

Note that for proper ssh target support one needs #22

[pcahyna]

On a second thought, should we actually aim to fix such problems? See https://github.com/ansible/molecule/issues/128#issuecomment-245009843 I mean, failures in check mode when the role has not been executed yet without check mode. (If so, we should change the sequence in molecule testing to run "check" before "converge".)