Adds a template for solar using the sunspot gem that makes the installation of solr trivial

- Adds gem dependencies for sunspot
- Adds a new solr_sunspot role
- Adds capistrano tasks for start, stop and reindex
Fixed common file template to use solr_sunspot instances instead of solr instances
Added openjdk as a library dependency to avoid having to download a separate jdk file
setup_solr_data_dir method should be inside the solr_sunspot namespace
Added role filter to avoid calling this function on other roles
Merge pull request #328 from gabceb/solr_sunspot

Adds a template for solar using the sunspot gem that makes the installatation trivial