Percona site has connectivity issues from OVH hosts (of Zuul).
This patch makes it so that:
- the internal repo is actually used
- RPM GPG keys are downloaded from the actually used repo
- Ubuntu mimics the RHEL behavior (i.e. the Percona repo is
enabled only in the xtrabackup image)
extra benefit: no need for APT preferences for Percona repo
to spare MariaDB deps
Change-Id: Id27831f6b404762f9e44fd6bd1c4702bf06b05f8
Signed-off-by: Radosław Piliszek <radoslaw.piliszek@gmail.com>
de58339a0e