adding first solr integration as part of issue #9

This PR requires a local installation of Solr using the schema provided in the `src/test/resources/index/schema.xml` file. The connection details are kept in `src/main/resources/mamute.properties` file. First step towards #9 
Everything in the static vars is only modified in the `setup()` method which is annotated with `@BeforeClass`. I based this test case's initialization off of the `DatabaseTestCase` class, but there may be a better way to do it. 

Should I just put the initializers in in `setup()` for now?