[test][docker] Update tests for new output of algorithm's call function

It now returns a tuple

beat/cmdline/test/test_docker.py

@@ -67,7 +67,8 @@ def test_execute_algorithm_using_database():
   input_field = instructions_data['inputs']['in']
   index_db_from_instructions(input_field)
 
-  nose.tools.eq_(call_algo('execute', instructions, cache=tmp_prefix), 0)
+  exit_code, outputs = call_algo('execute', instructions, cache=tmp_prefix)
+  nose.tools.eq_(exit_code, 0, msg=outputs)
 
 
 @slow
@@ -83,7 +84,8 @@ def test_execute_algorithm_using_cached_files():
 
   instructions = os.path.join(instructions_dir, 'algo_using_cached_files.json')
 
-  nose.tools.eq_(call_algo('execute', instructions, cache=tmp_prefix), 0)
+  exit_code, outputs = call_algo('execute', instructions, cache=tmp_prefix)
+  nose.tools.eq_(exit_code, 0, msg=outputs)
 
 
 @slow
@@ -104,7 +106,8 @@ def test_execute_algorithm_using_database_and_cached_files():
   input_field = instructions_data['inputs']['in1']
   index_db_from_instructions(input_field)
 
-  nose.tools.eq_(call_algo('execute', instructions, cache=tmp_prefix), 0)
+  exit_code, outputs = call_algo('execute', instructions, cache=tmp_prefix)
+  nose.tools.eq_(exit_code, 0, msg=outputs)
 
 
 @slow
@@ -120,7 +123,8 @@ def test_execute_analyzer():
 
   instructions = os.path.join(instructions_dir, 'analyzer.json')
 
-  nose.tools.eq_(call_algo('execute', instructions, cache=tmp_prefix), 0)
+  exit_code, outputs = call_algo('execute', instructions, cache=tmp_prefix)
+  nose.tools.eq_(exit_code, 0, msg=outputs)
 
 
 @slow