Move gr-display-name-utils to util/ to preserve history

Change-Id: I95a97ce1061edd9a0920fd778c697ccc35504edb
diff --git a/polygerrit-ui/app/scripts/gr-display-name-utils/gr-display-name-utils.js b/polygerrit-ui/app/utils/display-name-util.js
similarity index 100%
rename from polygerrit-ui/app/scripts/gr-display-name-utils/gr-display-name-utils.js
rename to polygerrit-ui/app/utils/display-name-util.js
diff --git a/polygerrit-ui/app/scripts/gr-display-name-utils/gr-display-name-utils_test.js b/polygerrit-ui/app/utils/display-name-util_test.js
similarity index 100%
rename from polygerrit-ui/app/scripts/gr-display-name-utils/gr-display-name-utils_test.js
rename to polygerrit-ui/app/utils/display-name-util_test.js