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 
You are right, I didn't see you are invoking data() on setup, maybe you could just do the initialization of the test objects(tags, questionindex, user). My fear is that sharing those objects on every test could cause some kind of instability. 

But yeah, it makes sense to keep the solr population on beforeclass