Add validator for ssh port to only accpet "22" or "1024-65535".

Change-Id: I4e5fe06ad0a1c8345e3b1265cbafdabc275bf1b5
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1118758
Signed-off-by: hadong <hadong@redhat.com>