Invalid hibernate configuration in debian packages with Oracle MySQL when system timezone containing a +

First, you need to have VirtualBox and Vagrant installed, then:

1. Create a new directory, and go inside

   mkdir stretch && cd stretch

2. Create a file called Vagrantfile, with the following content

   # -*- mode: ruby -*-
   # vi: set ft=ruby :
   
   Vagrant.configure("2") do |config|
     config.vm.box = "debian/stretch64"
   
     # To access XWiki from the outside on the port 8081
     config.vm.network "forwarded_port", guest: 8080, host: 8081
   
     # Configure the amount of memory on the VM
     config.vm.provider "virtualbox" do |vb|
       vb.memory = "3192"
     end
     
   end
   

3. Create and start the machine

   vagrant up

4. Connect to that machine

   vagrant ssh

5. That's it, you're logged into your new virtual machine with a fresh Debian Stretch install!
6. Note that you can browse to your wiki with your regular browser using the url http://localhost:8081/xwiki (there is a port redirection)
7. Make sure the timezone is a "problematic" one

   vagrant@stretch:~$ timedatectl | grep "Time zone"
          Time zone: GMT+0 (GMT, +0000)
   

8. Install the needed dependency to handle HTTPS repositories

   sudo apt-get install apt-transport-https
   

9. Now install Oracle MySQL repositories ; create the file /etc/apt/sources.list.d/mysql.list with the following content:

   deb http://repo.mysql.com/apt/debian/ stretch mysql-5.7
   

10. Install the Oracle's key

    wget -q "https://keyserver.ubuntu.com/pks/lookup?search=0x5072E1F5&op=get" -O- | sudo apt-key add -
    

11. Now install XWiki repository:

    sudo wget "https://maven.xwiki.org/stable/xwiki-stable.list" -P /etc/apt/sources.list.d/
    wget -q "https://maven.xwiki.org/public.gpg" -O- | sudo apt-key add -
    sudo apt-get update
    

12. Install XWiki 12.6.5 and CURL

    sudo apt-get install xwiki-tomcat8-mysql=12.6.5 xwiki-tomcat8-common=12.6.5 xwiki-mysql-common=12.6.5 xwiki-common=12.6.5 curl
    

13. Wait a bit, wake up xwiki

    curl http://localhost:8080/xwiki/bin/view/Main/
    

14. Wait until xwiki is initialized

    curl http://localhost:8080/xwiki/bin/view/Main/
    

    You end up with the following error in the page:

    java.sql.SQLException: Cannot create PoolableConnectionFactory (No timezone mapping entry for 'GMT 00:00')