Fixes#7350.
This PR changes the parsed modules from a `set` to a `dict`, with the filepath argument as the value. Accordingly, after calling `enable_mod` to enable `ssl_module`, modules now need to be re-parsed, so call `reset_modules`.
* Add mechanism for selecting apache config file, based on work done in #7191.
* Check OpenSSL version
* Remove os imports
* debian override still needs os
* Reformat remaining apache tests with modules dict syntax
* Clean up more apache tests
* Switch from property to method for openssl and add tests for coverage.
* Sometimes the dict location will be None in which case we should in fact return None
* warn thoroughly and consistently in openssl_version function
* update tests for new warnings
* read file as bytes, and factor out the open for testing
* normalize ssl_module_location path to account for being relative to server root
* Use byte literals in a python 2 and 3 compatible way
* string does need to be a literal
* patch builtins open
* add debug, remove space
* Add test to check if OpenSSL detection is working on different systems
* fix relative test location for cwd
* put </IfModule> on its own line in test case
* Revert test file to status in master.
* Call augeas load before reparsing modules to pick up the changes
* fix grep, tail, and mod_ssl location on centos
* strip the trailing whitespace from fedora
* just use LooseVersion in test
* call apache2ctl on debian systems
* Use sudo for apache2ctl command
* add check to make sure we're getting a version
* Add boolean so we don't warn on debian/ubuntu before trying to enable mod_ssl
* Reduce warnings while testing by setting mock _openssl_version.
* Make sure we're not throwing away any unwritten changes to the config
* test last warning case for coverage
* text changes for clarity
