Commit 038a51cdc8 introduced a change
where the sshd_config file is not managed unless the 'sshd_config'
pillar variable is defined. The kitchen tests did not define that
variable, so they stopped working.

This change sets a default value for 'Port' so the file is managed
by Salt.

This change has no impact on the kitchen tests, but only changes
a symbolic name from 'openssl' to 'openssh' to avoid confusion.