rework the composer and php images

dockerfiles/tasks/composer/Dockerfile-71

@@ -17,6 +17,7 @@ RUN apt-get update && apt-get install -y software-properties-common python-softw
     php-pgsql php-redis \
     \
   && apt-cache pkgnames | grep php7.1 \
+  && rm /usr/bin/php && ln -s /usr/bin/php7.1 /usr/bin/php \
   && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
   && php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" \
   && php composer-setup.php --install-dir=/usr/local/bin --filename=composer

dockerfiles/tasks/composer/Dockerfile-72

@@ -16,7 +16,7 @@ RUN apt-get update && apt-get install -y software-properties-common python-softw
     php7.2 php-cli php-fpm php-curl php-pear php-mcrypt php-zip php-mbstring php-xml \
     php-pgsql php-redis \
     \
-  && apt-cache pkgnames | grep php7.1 \
+  && apt-cache pkgnames | grep php7.2 \
   && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
   && php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" \
   && php composer-setup.php --install-dir=/usr/local/bin --filename=composer

dockerfiles/tasks/composer/build.sh

@@ -2,5 +2,13 @@
 
 
 docker build --rm -t xaicorp/composer:7.0 .
+docker run --rm --entrypoint php xaicorp/composer:7.0 --version | grep 'PHP 7.0.'
+docker run --rm xaicorp/composer:7.0 --version | grep 'Composer'
+
 docker build --rm -f Dockerfile-71 -t xaicorp/composer:7.1 .
+docker run --rm --entrypoint php xaicorp/composer:7.1 --version | grep 'PHP 7.1.'
+docker run --rm xaicorp/composer:7.1 --version | grep 'Composer'
+
 docker build --rm -f Dockerfile-72 -t xaicorp/composer:7.2 .
+docker run --rm --entrypoint php xaicorp/composer:7.2 --version | grep 'PHP 7.2.'
+docker run --rm xaicorp/composer:7.2 --version | grep 'Composer'