Comment 46 for bug 1665151

And as asked there this might help as well:
$ a2enmod info
$ systemctl restart apache2
$ apache2ctl -t -D DUMP_CONFIG|grep -i ssl
$ a2dismod info # if it hasn't been enabled before

That is a slightly better info than my Greps above, but still the same result.
Here of my last config trying to falsify the "default has to have TLSv1 to use it in others"

apache2ctl -t -D DUMP_CONFIG|grep -i ssl
# In file: /etc/apache2/mods-enabled/ssl.conf
Syntax OK
SSLRandomSeed startup builtin
SSLRandomSeed startup file:/dev/urandom 512
SSLRandomSeed connect builtin
SSLRandomSeed connect file:/dev/urandom 512
SSLPassPhraseDialog exec:/usr/share/apache2/ask-for-passphrase
SSLSessionCache shmcb:/var/run/apache2/ssl_scache(512000)
SSLSessionCacheTimeout 300
SSLCipherSuite HIGH:!aNULL
SSLProtocol all -SSLv3
# In file: /etc/apache2/sites-enabled/custom1-ssl.conf
  SSLEngine on
  SSLCertificateFile /etc/ssl/certs/ssl-cert-snakeoil.pem
  SSLCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key
    SSLOptions +StdEnvVars
    SSLOptions +StdEnvVars
  SSLProtocol All -TLSv1 -TLSv1.1
# In file: /etc/apache2/sites-enabled/custom2-ssl.conf
  SSLEngine on
  SSLCertificateFile /etc/ssl/certs/ssl-cert-snakeoil.pem
  SSLCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key
    SSLOptions +StdEnvVars
    SSLOptions +StdEnvVars
# In file: /etc/apache2/sites-enabled/default-ssl.conf
  SSLEngine on
  SSLCertificateFile /etc/ssl/certs/ssl-cert-snakeoil.pem
  SSLCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key
    SSLOptions +StdEnvVars
    SSLOptions +StdEnvVars
  SSLProtocol All -TLSv1 -TLSv1.1