travis: copy required config file

.travis.yml

 
 before_script:
   - cp ${TRAVIS_BUILD_DIR}/tracim/development.ini.base ${TRAVIS_BUILD_DIR}/tracim/development.ini
+  - cp ${TRAVIS_BUILD_DIR}/tracim/wsgidav.conf.sample ${TRAVIS_BUILD_DIR}/tracim/wsgidav.conf
 
   - sh -c "if [ '$DB' = 'postgres' ]; then psql -c 'create database tracim_test;' -U postgres; fi"
   - sh -c "if [ '$DB' = 'postgres' ]; then cd ${TRAVIS_BUILD_DIR}/tracim && sed -i \"s/\(sqlalchemy.url *= *\).*/\1postgresql:\/\/postgres:dummy@127.0.0.1:5432\/tracim_test?client_encoding=utf8/\" test.ini; fi"