Modify the NewChange template when the sender is not equal to the owner

In all cases, we used to send notifications for new change creations as:
"$user_1 would like $user_2 to review this change."

This form is a bit confusing when user_1 is not the change author. This
commit adjusts the text when the sender is not equal to the owner to:
"$user_1 would like $user_2 to review this change authored by $user_3."

Change-Id: I41250dcf10aebf188dfb78c40292432b67546af8
diff --git a/resources/com/google/gerrit/server/mail/NewChangeHtml.soy b/resources/com/google/gerrit/server/mail/NewChangeHtml.soy
index 9de8707..e16b213 100644
--- a/resources/com/google/gerrit/server/mail/NewChangeHtml.soy
+++ b/resources/com/google/gerrit/server/mail/NewChangeHtml.soy
@@ -32,7 +32,8 @@
         {/if}
         {$reviewerName}
       {/for}{sp}
-      to <strong>review</strong> this change.
+      to <strong>review</strong> this change
+      {if $fromName != $ownerName}{sp}authored by {$ownerName}{/if}.
     {else}
       {$ownerName} has uploaded this change for <strong>review</strong>.
     {/if}