(MODULES-9014) Improve SSLSessionTickets handling

[FredL69]

• Make ssl_sessiontickets parameter optional
• Set default value for ssl_sessiontickets to undef (Compatible
  with all Apache versions)
• Update documentation and unit tests accordingly

@sheenaajay Here the the pull request with the fixes you expected. ssl_sessiontickets is now optional with the default value set to undef. So, by default, the parameter will not be set and nothing will break on older distributions. Moreover it simplifies the code, which is always a good thing.

[sheenaajay]

@FredericLespez Wow looks good. Running the acceptance tests on different platforms. Thank you

[FredL69]

@sheenaajay Test failed but apparently not because of the submitted code:
centos-7-x64 12:44:59$ rpm --replacepkgs -Uvh http://yum.puppet.com/puppet6/puppet6-release-el-7.noarch.rpm
curl: (22) The requested URL returned error: 404 Not Found
error: skipping http://yum.puppet.com/puppet6/puppet6-release-el-7.noarch.rpm - transfer failed
Retrieving http://yum.puppet.com/puppet6/puppet6-release-el-7.noarch.rpm

The right URL is http://yum.puppet.com/puppet6-release-el-7.noarch.rpm.
Do you know of to fix that ?

[sheenaajay]

@FredericLespez No worries.Its centos7 issues(rpm link is invalid).We are working on the problem. Hopefully will resolve it soon. All the rest of the platforms passed also. Will merge it as soon as ceentos7 problems are fixed from our side.Thanks for the quick fix.

[sheenaajay]

@FredericLespez centos errors are fixed. Restarted the build. Will merge it as soon as its finished running.

[FredL69]

@sheenaajay That's great! Thanks.