Optimized drupal core fetching process

Author: andriyun

.travis.yml

@@ -26,8 +26,9 @@ install:
   - nvm install node
   - nvm use node
   - npm install --global yarn
-  - composer create-project drupal-composer/drupal-project:8.x-dev ../drupal --no-interaction
-  - cd ../drupal
+  - cd ../ && drush dl drupal-8 --drupal-project-rename=drupal
+  - cd drupal
+  - DRUPAL_ROOT=$(pwd)
 # See definition of variabled in Travis CI config.
 #  - export REPOSITORIES='"repositories": \['
 #  - export REPOSITORIES_REPLACE='"repositories": \[\{"type": "path","url": "..\/os2web", "options": \{"symlink": false\}\},\},'
@@ -36,7 +37,6 @@ install:
   - sed -i "s/$REPOSITORIES/$REPOSITORIES_REPLACE/g" composer.json
   - sed -i "s/$REQUIRE/$REQUIRE_REPLACE/g" composer.json
   - composer update
-  - DRUPAL_ROOT=$(pwd)/web
   - cd $DRUPAL_ROOT/core
   - yarn install
   - npm install --global eslint-config-drupal-bundle stylelint