Add requirements.txt file for python libs

.travis.yml

@@ -31,7 +31,8 @@ install:
   - git clone https://github.com/OCA/maintainer-quality-tools.git ${HOME}/maintainer-quality-tools
   - export PATH=${HOME}/maintainer-quality-tools/travis:${PATH}
   - travis_install_nightly
-  - pip install phonenumbers py-Asterisk SOAPpy
+  - printf '[options]\n\nrunning_env = dev\n' > ${HOME}/.openerp_serverrc
+  - ln -s ${TRAVIS_BUILD_DIR}/server_environment_files_sample ${TRAVIS_BUILD_DIR}/server_environment_files
 
 script:
   - travis_run_tests

requirements.txt

@@ -0,0 +1,3 @@
+phonenumbers
+py-Asterisk
+SOAPpy