The /etc/os-release based distro detection doesn't
seem to work for Ubuntu 10.04 (no /etc/os-release?).
So it was testing the next case which was /etc/lsb-release to
see if it is 'Mandriva'. Since the check for existence of
(/etc/lsb-release, Mandrive) was the first non-empty dist
file match, 'ansible_distribution' was being set to 'Mandriva'
expecting to be corrected by the data from the dist file content.
But since the dist file parsing for Mandriva didn't match for
Ubuntu 10.04 /etc/lsb-release _and_ there is no Debian specific
lsb-release check, 'ansible_distribution' stayed at 'Mandriva'
and the dist file checking loop keeps going and eventually off
the end of the list before finding a better match.
Adding a debian/ubuntu specific check for /etc/lsb-release after
the debian os-release sets the info correctly and stops further
checking of dist files.
Fixes#30693
65393e4747