Merge pull request #2751 from nalatreb/fix-mongo-install-php56

fix travis ci failing tests

php-fpm/Dockerfile

@@ -312,9 +312,10 @@ RUN if [ ${INSTALL_MONGO} = true ]; then \
     if [ $(php -r "echo PHP_MAJOR_VERSION;") = "5" ]; then \
       pecl install mongo && \
       docker-php-ext-enable mongo \
-    ;fi && \
-    pecl install mongodb && \
-    docker-php-ext-enable mongodb \
+    ;else \
+      pecl install mongodb && \
+      docker-php-ext-enable mongodb \
+    ;fi \
 ;fi
 
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