This patch adds /etc/pki/rpm-gpg/PERCONA-PACKAGING-KEY which
comes from installing [1] and is required in order to install
the percona packages on CentOS packages. Without it we get
the error:
Public key for percona-toolkit-3.0.13-1.el7.x86_64.rpm is not installed
We also rename RPM-GPG-KEY-percona to RPM-GPG-KEY-Percona in
order to match what is done by [1].
[1] https://repo.percona.com/yum/percona-release-latest.noarch.rpm
Change-Id: I2eeac8ea21c52fac3b1f32036fedcf7c62aac37f