Add support for running tests from a Docker container.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

contrib/scripts/docker/run-tests.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+apt-get update
+apt-get install -y --no-install-recommends tesseract-ocr-deu
+
+pip install -r $DOCKER_ROOT/requirements-testing.txt
+
+mayan-edms.py test --mayan-apps