Move solr into a separate make file

A couple issues with the apachesolr stub in os_project.make:
1. It's enabled by default, but many (likely a majority) of projects don't require solr
2. Out of the last 4 projects that have used Solr, all have used the Search API implementation

This change removes the apachesolr stub and puts the standard search api, search api solr, search api attachments and facet api module set into a solr include.