Content type constants used in lfs should be final

Change-Id: Ia56a9f58e336c25255a81d9402e198e5ce5da442
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.lfs/.settings/.api_filters

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<component id="org.eclipse.jgit.lfs" version="2">
+    <resource path="src/org/eclipse/jgit/lfs/lib/Constants.java" type="org.eclipse.jgit.lfs.lib.Constants">
+        <filter id="388100214">
+            <message_arguments>
+                <message_argument value="org.eclipse.jgit.lfs.lib.Constants"/>
+                <message_argument value="CONTENT_TYPE_GIT_LFS_JSON"/>
+            </message_arguments>
+        </filter>
+        <filter id="388100214">
+            <message_arguments>
+                <message_argument value="org.eclipse.jgit.lfs.lib.Constants"/>
+                <message_argument value="HDR_APPLICATION_OCTET_STREAM"/>
+            </message_arguments>
+        </filter>
+    </resource>
+</component>

org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/lib/Constants.java

@@ -115,11 +115,11 @@ public final class Constants {
 	 * Content type used by LFS REST API as defined in
 	 * {@link "https://github.com/github/git-lfs/blob/master/docs/api/v1/http-v1-batch.md"}
 	 */
-	public static String CONTENT_TYPE_GIT_LFS_JSON = "application/vnd.git-lfs+json";
+	public static final String CONTENT_TYPE_GIT_LFS_JSON = "application/vnd.git-lfs+json";
 
 	/**
 	 * "arbitrary binary data" as defined in RFC 2046
 	 * {@link "https://www.ietf.org/rfc/rfc2046.txt"}
 	 */
-	public static String HDR_APPLICATION_OCTET_STREAM = "application/octet-stream";
+	public static final String HDR_APPLICATION_OCTET_STREAM = "application/octet-stream";
 }