Updated to move composer install to entry point

Author: thilanga

.travis.yml

@@ -26,7 +26,6 @@ install:
   - docker-compose version
   - docker-compose up --build -d
   - docker ps -a
-  - docker exec -it php_test composer install --prefer-source --no-interaction
 
 script:
   - docker-compose up

docker/entrypoint.sh

@@ -1,2 +1,3 @@
 #!/usr/bin/env bash
-sleep 3 && php ./vendor/bin/phpunit
+
+sleep 3 && composer install --prefer-source --no-interaction && php ./vendor/bin/phpunit