Trying fix travis 2

Author: pitbulk

.travis.yml

@@ -5,10 +5,10 @@ python:
 
 pre-install:
   - 'sudo apt-get update -qq'
-  - 'sudo apt-get install -qq libxml2-dev'
+  - 'sudo apt-get install -qq libxml2-dev libxmlsec1-dev'
 install:
-  - 'travis_retry pip install . --use-mirrors'
-  - 'travis_retry pip install -e ".[test]" --use-mirrors'
+  - 'travis_retry pip install .'
+  - 'travis_retry pip install -e ".[test]"'
 
 script: 
   - 'coverage run --source=src/onelogin/saml2 --rcfile=tests/coverage.rc setup.py test'