Mofied Travis CI to use Apache.
Corrected incorrect php.ini and vhost.conf copy path.
Fixed broken php.ini copy directive.
Fixed broken drush si DB string.
Updated Flag and FlagInterface due to https://www.drupal.org/node/2352673.
Updated references to DefaultSingleLazyPluginCollection.
Merge pull request #92 from socketwench/PR-use-apache-for-travis-ci

Modify Travis CI to use Apache