allow minimum of failed tests for Perl
fix typo, improve logging
move up debug log message
allow a single test to fail too, make the last 's' is 'tests' optional in regex
Merge branch 'develop' into perl_test
pin locale for Perl 'make test' to C by setting $LC_ALL
Merge pull request #425 from boegel/perl_test

allow minimal amount of failing tests for Perl