Env variable conflict (#1734)

* php-fpm and workspace arg var rename: PHP_VERSION to  LARADOCK_PHP_VERSION.
* travis-ci skip phpbdg

travis-build.sh

@@ -14,6 +14,7 @@ if [ -n "${PHP_VERSION}" ]; then
     cp env-example .env
     sed -i -- "s/PHP_VERSION=.*/PHP_VERSION=${PHP_VERSION}/g" .env
     sed -i -- 's/=false/=true/g' .env
+    sed -i -- 's/PHPDBG=true/PHPDBG=false/g' .env
     cat .env
     docker-compose build ${BUILD_SERVICE}
     docker images