Use eunit.config instead of vm.args to silence error_logger

While both handles problem well, options in vm.args eventually becomes
overridden by some internal stuff and error_logger gets his tty handler
back.

Config-way is more reliable here and also prevents us to hit exotic
issues like race with test node start or warnings about bad node name
used in tests.

So far, to run specific test without distractive noise, use
the following template:

    BUILDDIR=`pwd` ERL_AFLAGS="-config `pwd`/rel/files/eunit.config` ./bin/rebar -r eunit ...

1 files changed, 16 insertions, 0 deletions

diff --git a/rel/files/eunit.config b/rel/files/eunit.config
new file mode 100644
index 000000000..3c7457d3a
--- /dev/null
+++ b/rel/files/eunit.config
@@ -0,0 +1,16 @@
+% Licensed under the Apache License, Version 2.0 (the "License"); you may not
+% use this file except in compliance with the License. You may obtain a copy of
+% the License at
+%
+%   http://www.apache.org/licenses/LICENSE-2.0
+%
+% Unless required by applicable law or agreed to in writing, software
+% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+% License for the specific language governing permissions and limitations under
+% the License.
+
+[
+    {kernel, [{error_logger, silent}]},
+    {sasl, [{sasl_error_logger, false}]}
+].