MODULES-10023 disable new xtrabackup tests on EOL operating systems

Author: fraenki

spec/acceptance/mysql_backup_spec.rb

@@ -136,7 +136,7 @@ class { 'mysql::server::backup':
 end
 
 context 'with xtrabackup enabled' do
-  context 'should work with no errors' do
+  context 'should work with no errors', if: ((os[:family] == 'debian' && os[:release].to_i >= 8) || (os[:family] == 'ubuntu' && os[:release] =~ %r{^16\.04|^18\.04}) || (os[:family] == 'redhat' && os[:release].to_i >= 6)) do # rubocop:disable Metrics/LineLength
     pp = <<-MANIFEST
           class { 'mysql::server': root_password => 'password' }
           mysql::db { [
@@ -208,7 +208,7 @@ class { 'mysql::server::backup':
     end
   end
 
-  describe 'xtrabackup.sh', if: Gem::Version.new(mysql_version) < Gem::Version.new('5.7.0') do
+  describe 'xtrabackup.sh', if: Gem::Version.new(mysql_version) < Gem::Version.new('5.7.0') && ((os[:family] == 'debian' && os[:release].to_i >= 8) || (os[:family] == 'ubuntu' && os[:release] =~ %r{^16\.04|^18\.04}) || (os[:family] == 'redhat' && os[:release].to_i >= 6)) do # rubocop:disable Metrics/LineLength
     before(:all) do
       pre_run
     end
@@ -258,7 +258,7 @@ class { 'mysql::server::backup':
 end
 
 context 'with xtrabackup enabled and incremental backups disabled' do
-  context 'should work with no errors' do
+  context 'should work with no errors', if: ((os[:family] == 'debian' && os[:release].to_i >= 8) || (os[:family] == 'ubuntu' && os[:release] =~ %r{^16\.04|^18\.04}) || (os[:family] == 'redhat' && os[:release].to_i >= 6)) do # rubocop:disable Metrics/LineLength
     pp = <<-MANIFEST
           class { 'mysql::server': root_password => 'password' }
           mysql::db { [
@@ -331,7 +331,7 @@ class { 'mysql::server::backup':
     end
   end
 
-  describe 'xtrabackup.sh', if: Gem::Version.new(mysql_version) < Gem::Version.new('5.7.0') do
+  describe 'xtrabackup.sh', if: Gem::Version.new(mysql_version) < Gem::Version.new('5.7.0') && ((os[:family] == 'debian' && os[:release].to_i >= 8) || (os[:family] == 'ubuntu' && os[:release] =~ %r{^16\.04|^18\.04}) || (os[:family] == 'redhat' && os[:release].to_i >= 6)) do # rubocop:disable Metrics/LineLength
     before(:all) do
       pre_run
     end