Adapt to the JGit v4.5.x

This version of JGit removes the 'release()' method in many interfaces
and classes in favor of implementing the AutoCloseable interface.

Change-Id: I32ddb5e9f5f1e7fa20e260b6cf63caed5eaf3f95

src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java b/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java
index ffa8a8b..0f24f48 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java
@@ -157,7 +157,7 @@
         }
       }
     } finally {
-      rw.release();
+      rw.close();
     }
   }
 
@@ -178,7 +178,7 @@
         getMessage().append("* ").append(commit.getShortMessage()).append("\n");
       }
     } finally {
-      rw.release();
+      rw.close();
     }
   }
 
@@ -194,7 +194,7 @@
               message.toString());
     } finally {
       if (inserter != null) {
-        inserter.release();
+        inserter.close();
       }
     }
   }