Update gitignore.

Update gitignore to ignore solr configured file.
Update Vagrantfile

Update Vagrantfile to include solr configuration as a provision
script.
Add solr configuration files
Remove solr configuration from ckan installation

The solr configuration was made in the ckan installation script
but now has its own script
Update gitignore

.gitignore was ignoring the solr/ckan directory, which contains
the CKAN configuration for Solr.
Merge branch 'enhancement-#23'