media assets: include image width, height, and file type in EXIF metadata.

Previously the width, height, and file type fields returned by ExifTool
weren't saved in the media metadata because they were already saved in
the media asset. However, in some cases, it can be useful to compare
ExifTool's version of these fields with our own. This can be useful when
an image is corrupt and libvips can't get the width or height, or when
it's a video and we want to make sure we detected the correct type of video.

script/files/123_refresh_media_metatadata.rb needs to be run after this
to update the metadata.

app/logical/exif_tool.rb

@@ -9,8 +9,8 @@ class ExifTool
   # @see https://exiftool.org/exiftool_pod.html#OPTIONS
   DEFAULT_OPTIONS = %q(
     -G1 -duplicates -unknown -struct --binary
-    -x 'System:*' -x ExifToolVersion -x FileType -x FileTypeExtension
-    -x MIMEType -x ImageWidth -x ImageHeight -x ImageSize -x MegaPixels
+    -x 'System:*' -x ExifToolVersion -x FileTypeExtension
+    -x MIMEType -x ImageSize -x MegaPixels
   ).squish
 
   attr_reader :file

test/unit/media_file_test.rb

@@ -273,7 +273,7 @@ class MediaFileTest < ActiveSupport::TestCase
 
       assert_equal(true, @metadata["Flash:Compressed"])
       assert_not_equal("Install Compress::Zlib to extract compressed information", @metadata["ExifTool:Warning"])
-      assert_equal(6, @metadata.count)
+      assert_equal(9, @metadata.count)
     end
   end
 
@@ -469,7 +469,7 @@ class MediaFileTest < ActiveSupport::TestCase
       assert_equal(true, @file.is_corrupt?)
       assert_equal("File format error", @metadata["ExifTool:Error"])
       assert_equal("89a", @metadata["GIF:GIFVersion"])
-      assert_equal(6, @metadata.count)
+      assert_equal(9, @metadata.count)
     end
 
     should "not raise an exception when reading the frame count" do
@@ -480,7 +480,7 @@ class MediaFileTest < ActiveSupport::TestCase
       assert_equal(nil, @file.frame_count)
       assert_equal("File format error", @metadata["ExifTool:Error"])
       assert_equal("89a", @metadata["GIF:GIFVersion"])
-      assert_equal(6, @metadata.count)
+      assert_equal(9, @metadata.count)
       assert_nothing_raised { @file.attributes }
     end
   end
@@ -492,7 +492,7 @@ class MediaFileTest < ActiveSupport::TestCase
 
       assert_equal(true, @file.is_corrupt?)
       assert_equal("Grayscale", @metadata["PNG:ColorType"])
-      assert_equal(6, @metadata.count)
+      assert_equal(9, @metadata.count)
     end
   end
 
@@ -503,7 +503,7 @@ class MediaFileTest < ActiveSupport::TestCase
 
       assert_equal(true, @file.is_corrupt?)
       assert_equal(1, @metadata["File:ColorComponents"])
-      assert_equal(7, @metadata.count)
+      assert_equal(10, @metadata.count)
     end
   end