MINOR: ssl/cli: reorder 'show ssl cert' output

MINOR: ssl/cli: reorder 'show ssl cert' output

Reorder the 'show ssl cert' output so it's easier to see if the whole
chain is correct.

For a chain to be correct, an "Issuer" line must have the same
content as the next "Subject" line.

Example:

  Subject: /C=FR/ST=Paris/O=HAProxy Test Certificate/CN=test.haproxy.local
  Issuer: /C=FR/ST=Paris/O=HAProxy Test Intermediate CA 2/CN=ca2.haproxy.local
  Chain Subject: /C=FR/ST=Paris/O=HAProxy Test Intermediate CA 2/CN=ca2.haproxy.local
  Chain Issuer: /C=FR/ST=Paris/O=HAProxy Test Intermediate CA 1/CN=ca1.haproxy.local
  Chain Subject: /C=FR/ST=Paris/O=HAProxy Test Intermediate CA 1/CN=ca1.haproxy.local
  Chain Issuer: /C=FR/ST=Paris/O=HAProxy Test Root CA/CN=root.haproxy.local