Add spec have_authorized_key matcher.

for check user do have a ssh authorized_key.
Add have_authorized_key matcher.

for check user do have a ssh authorozed_key.
SSH publickey test data comment changed.

To be able to understand the test data at a glance
Add remove ssh publickey comment code and shellscript refactoring.

･Refactoring a shellscript to check the SSH public key.
･Commands spec is changed for new command test.
･Before check remove ssh publickey comment.
Merge remote branch 'pr/75/head'