Updated 5.7 to 5.7.9

Author: MySQL Build Team

5.7/Dockerfile

@@ -1,6 +1,6 @@
 FROM oraclelinux:latest
 
-ENV PACKAGE_URL https://repo.mysql.com/yum/mysql-5.7-community/docker/x86_64/mysql-community-server-minimal-5.7.8-0.4.rc.el7.x86_64.rpm
+ENV PACKAGE_URL https://repo.mysql.com/yum/mysql-5.7-community/docker/x86_64/mysql-community-server-minimal-5.7.9-1.el7.x86_64.rpm
 
 # Install server
 RUN rpmkeys --import http://repo.mysql.com/RPM-GPG-KEY-mysql \