test: update and fix all tests (inc. provide files for comparison)

test/integration/default/controls/config_spec.rb

test/integration/default/controls/packages_spec.rb

test/integration/default/controls/services_spec.rb

test/integration/default/controls/yaml_dump_spec.rb

test/salt/comparison_files/main_config/amazon-2

test/salt/comparison_files/main_config/centos-7

test/salt/comparison_files/main_config/debian-10

test/salt/comparison_files/main_config/debian-8

test/salt/comparison_files/main_config/debian-9

test/salt/comparison_files/main_config/fedora-31

test/salt/comparison_files/main_config/opensuse-15

test/salt/comparison_files/main_config/ubuntu-16

test/salt/comparison_files/main_config/ubuntu-18

test/salt/comparison_files/server_xml/amazon-2.xml

test/salt/comparison_files/server_xml/centos-7.xml

test/salt/comparison_files/server_xml/debian-10.xml

test/salt/comparison_files/server_xml/debian-8.xml

test/salt/comparison_files/server_xml/debian-9.xml

test/salt/comparison_files/server_xml/fedora-31.xml

test/salt/comparison_files/server_xml/opensuse-15.xml