Adding SetBasicAuth and making request using those if they have some value
#11 Since SolrInterface can instantiate without conn, make sure that conn exists before setting basic auth, introduce error
#11 printing out basic auth in mock
#11 step up version
#11 Adding docstring
#11 send also basic auth in a post request
Merge pull request #19 from vanng822/feature/11_basic_auth

Basic auth incase solr is using it see #11