Cleanup of example test files

diff --git a/file_format_1_example_0 b/test_files/file_format_1_example_0
similarity index 100%
rename from file_format_1_example_0
rename to test_files/file_format_1_example_0

diff --git a/file_format_1_example_1 b/test_files/file_format_1_example_1
similarity index 100%
rename from file_format_1_example_1
rename to test_files/file_format_1_example_1

diff --git a/invalid_file_format_0_example_0 b/test_files/invalid_file_format_0_example_0
similarity index 100%
rename from invalid_file_format_0_example_0
rename to test_files/invalid_file_format_0_example_0

diff --git a/invalid_file_format_0_example_1 b/test_files/invalid_file_format_0_example_1
similarity index 100%
rename from invalid_file_format_0_example_1
rename to test_files/invalid_file_format_0_example_1

diff --git a/invalid_file_format_1_example_0 b/test_files/invalid_file_format_1_example_0
similarity index 100%
rename from invalid_file_format_1_example_0
rename to test_files/invalid_file_format_1_example_0

diff --git a/invalid_file_format_1_example_1 b/test_files/invalid_file_format_1_example_1
similarity index 100%
rename from invalid_file_format_1_example_1
rename to test_files/invalid_file_format_1_example_1

diff --git a/invalid_file_format_1_example_2 b/test_files/invalid_file_format_1_example_2
similarity index 100%
rename from invalid_file_format_1_example_2
rename to test_files/invalid_file_format_1_example_2