Simplify a bit commenting from template file.

Directly pass template filename to setMinusTwo and commentOnReview.
diff --git a/src/main/java/com/criteo/gerrit/plugins/automerge/AutomaticMerger.java b/src/main/java/com/criteo/gerrit/plugins/automerge/AutomaticMerger.java
index 7857f49..102b71d 100644
--- a/src/main/java/com/criteo/gerrit/plugins/automerge/AutomaticMerger.java
+++ b/src/main/java/com/criteo/gerrit/plugins/automerge/AutomaticMerger.java
@@ -121,11 +121,9 @@
 
         if (atomicityHelper.isAtomicReview(change)) {
           if (atomicityHelper.hasDependentReview(reviewNumber)) {
-            reviewUpdater.setMinusTwo(reviewNumber,
-                config.getCommentFromFile(AutomergeConfig.ATOMIC_REVIEWS_SAME_REPO_FILE));
+            reviewUpdater.setMinusTwo(reviewNumber, AutomergeConfig.ATOMIC_REVIEWS_SAME_REPO_FILE);
           } else {
-            reviewUpdater.commentOnReview(reviewNumber,
-                config.getCommentFromFile(AutomergeConfig.ATOMIC_REVIEW_DETECTED_FILE));
+            reviewUpdater.commentOnReview(reviewNumber, AutomergeConfig.ATOMIC_REVIEW_DETECTED_FILE);
           }
         }
       }
@@ -141,11 +139,9 @@
         }
         if (atomicityHelper.isAtomicReview(change)) {
           if (atomicityHelper.hasDependentReview(reviewNumber)) {
-            reviewUpdater.setMinusTwo(reviewNumber,
-                config.getCommentFromFile(AutomergeConfig.ATOMIC_REVIEWS_SAME_REPO_FILE));
+            reviewUpdater.setMinusTwo(reviewNumber, AutomergeConfig.ATOMIC_REVIEWS_SAME_REPO_FILE);
           } else {
-            reviewUpdater.commentOnReview(reviewNumber,
-                config.getCommentFromFile(AutomergeConfig.ATOMIC_REVIEW_DETECTED_FILE));
+            reviewUpdater.commentOnReview(reviewNumber, AutomergeConfig.ATOMIC_REVIEW_DETECTED_FILE);
           }
         }
       }
@@ -206,8 +202,7 @@
             }
           } else {
             if (why != null) {
-              reviewUpdater.commentOnReview(reviewNumber,
-                  config.getCommentFromFile(AutomergeConfig.CANT_MERGE_COMMENT_FILE));
+              reviewUpdater.commentOnReview(reviewNumber, AutomergeConfig.CANT_MERGE_COMMENT_FILE);
             }
           }
         }
diff --git a/src/main/java/com/criteo/gerrit/plugins/automerge/ReviewUpdater.java b/src/main/java/com/criteo/gerrit/plugins/automerge/ReviewUpdater.java
index dc06f9f..12138f1 100644
--- a/src/main/java/com/criteo/gerrit/plugins/automerge/ReviewUpdater.java
+++ b/src/main/java/com/criteo/gerrit/plugins/automerge/ReviewUpdater.java
@@ -49,10 +49,10 @@
     this.config = config;
   }
 
-  public void commentOnReview(final int number, final String comment) throws NoSuchChangeException, OrmException,
-      AuthException, BadRequestException, UnprocessableEntityException, IOException {
+  public void commentOnReview(final int number, final String commentTemplate) throws NoSuchChangeException,
+      OrmException, AuthException, BadRequestException, UnprocessableEntityException, IOException {
     final ReviewInput message = new ReviewInput();
-    message.message = comment;
+    message.message = config.getCommentFromFile(commentTemplate);
     final Set<Account.Id> ids = byEmailCache.get(config.getBotEmail());
     final IdentifiedUser bot = factory.create(ids.iterator().next());
     final ChangeControl ctl = changeFactory.controlFor(new Change.Id(number), bot);
@@ -62,10 +62,10 @@
     reviewer.get().apply(r, message);
   }
 
-  public void setMinusTwo(final int number, final String comment) throws NoSuchChangeException, OrmException,
+  public void setMinusTwo(final int number, final String commentTemplate) throws NoSuchChangeException, OrmException,
       AuthException, BadRequestException, UnprocessableEntityException, IOException {
     final ReviewInput message = new ReviewInput();
-    message.message = comment;
+    message.message = config.getCommentFromFile(commentTemplate);
     message.label("Code-Review", -2);
     final Set<Account.Id> ids = byEmailCache.get(config.getBotEmail());
     final IdentifiedUser bot = factory.create(ids.iterator().next());