Commits on Jul 17, 2017

1. use 'unite' for eunit error formatting …

   'unite' provides way nicer error output from 'eunit' tests - one thing I found particularly useful when hacking on hackney was the fact that it provides diff'd output on 'assertEqual' assertions whereas the default output formatter truncates the output. 
   
   A follow up P/R will patch the unit tests to use assertions rather than equality checks, e.g:
   
   ```
    [{V, fun() -> ?assertMatch(R,hackney_url:parse_url(V)) end} || {V, R} <- Tests] ++
   ```
   
   
   I have an active [P/R](eproxus/unite#10) with eproxus to correct a unhandled case statement - this dependency is to my patched version.
   
   Examples: 
   
   ```
   1) "module 'hackney_integration_tests'"                              
       get_request/0 (/common/hackney/_build/test/lib/hackney/test/hackney_integration_tests.erl:49)                                            
       Instantiation failed:          
       exception error: no match of right hand side value {error,econnrefused}                                                                        in function  hackney_integration_tests:get_request/0 (/common/hackney/_build/test/lib/hackney/test/hackney_integration_tests.erl, line 49)
         in call from hackney_integration_tests:all_tests/0 (/common/hackney/_build/test/lib/hackney/test/hackney_integration_tests.erl, line 7)      in call from hackney_integration_tests:'-http_requests_test_/0-fun-2-'/1 (/common/hackney/_build/test/lib/hackney/test/hackney_integration_tests.erl, line 38)
   
   151 tests passed  1 fixture cancelled  (0.93 s)                       
   ===> Error running tests
   ```
           
   ('assertMatch') 
   
   ```
    1) "http://www.example.com/path?key=value#Section%205"
       parse_and_unparse_url_test_/0 (/common/hackney/_build/test/lib/hackney/test/hackney_url_tests.erl:140)
       Assert match failed!
       Expression:
           hackney_url:parse_url(V)
       Pattern:
           R
       Actual:
           {hackney_url,hackney_tcp,http,<<"www.example.com">>,
                        <<"/path?key=value#Section%205">>,<<"/path">>,
                        <<"key=value">>,<<"Section%205">>,"www.example.com",80,
                        <<>>,<<>>}
   ```

   Bryan Hunt committed Jul 17, 2017
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