validate ci logs outside docker container. See #45 for details

.travis.yml

@@ -9,7 +9,7 @@ compiler:
 before_install:
     - docker build --tag=dash/testing ./dash/scripts/docker-testing/mpich/
 script:
-    - docker run -v $PWD:/opt/dash dash/testing /bin/sh -c "export DASH_MAX_UNITS='2'; sh dash/scripts/dash-ci.sh | grep -v 'LOG =' | tee dash-ci.log 2> dash-ci.err;"
+    - sh ./dash/scripts/travisci/run-docker.sh 
     - cat ./dash-ci.log | grep "PASSED" || return 1
 after_script:
     - cat ./build-ci/*/*/test_mpi.log | grep -v "LOG"