message: elle.log: fix test suite
diff: @@ -48,7 +48,8 @@ namespace
  logger = std::make_unique<elle::log::TextLogger>(ss);
  }
  else
  - logger = std::make_unique<elle::log::TextLogger>(ss, "DUMP", true);
  + logger = std::make_unique<elle::log::TextLogger>(ss, "DUMP", "ELLE_LOG_LEVEL",
  + true);
  BOOST_TEST(logger->component_level("Test") == Level::dump);
  auto prev = elle::log::logger(std::move(logger));
  @@ -190,12 +191,11 @@ _environment_format_test(bool env)
  logger = new elle::log::TextLogger(
  ss,
  "", // log_level
  + "ELLE_LOG_LEVEL", // envvar
  false, // display_type
  false, // enable_pid
  false, // enable_tid
  - // FIXME: Checking time printing is non-deterministic.
  - // true, // enable_time
  - false,
  + false, // true, enable_time. FIXME: Checking time printing is non-deterministic.
  false // universal_time
  );
  }
  @@ -227,6 +227,7 @@ _environment_format_test(bool env)
  logger = new elle::log::TextLogger(
  ss,
  "", // log_level
  + "ELLE_LOG_LEVEL", // envvar
  false, // display_type
  false, // enable_pid
  false, // enable_tid
  @@ -264,6 +265,7 @@ _environment_format_test(bool env)
  logger = new elle::log::TextLogger(
  ss,
  "", // log_level
  + "ELLE_LOG_LEVEL", // envvar
  false, // display_type
  true, // enable_pid
  false, // enable_tid
  @@ -298,6 +300,7 @@ _environment_format_test(bool env)
  logger = new elle::log::TextLogger(
  ss,
  "", // log_level
  + "ELLE_LOG_LEVEL", // envvar
  false, // display_type
  true, // enable_pid
  false, // enable_tid
  @@ -339,6 +342,7 @@ _environment_format_test(bool env)
  logger = new elle::log::TextLogger(
  ss,
  "", // log_level
  + "ELLE_LOG_LEVEL", // envvar
  false, // display_type
  true, // enable_pid
  false, // enable_tid
  @@ -375,6 +379,7 @@ _environment_format_test(bool env)
  logger = new elle::log::TextLogger(
  ss,
  "", // log_level
  + "ELLE_LOG_LEVEL", // envvar
  true, // display_type
  false, // enable_pid
  false, // enable_tid
  