ObjectDirectory: Clean up logging

Externalize the message and log the pack file with absolute path.

Change-Id: I019052dfae8fd96ab67da08b3287d699287004cb
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties

@@ -712,6 +712,7 @@ truncatedHunkOldLinesMissing=Truncated hunk, at least {0} old lines is missing
 tSizeMustBeGreaterOrEqual1=tSize must be >= 1
 unableToCheckConnectivity=Unable to check connectivity.
 unableToCreateNewObject=Unable to create new object: {0}
+unableToReadPackfile=Unable to read packfile {0}
 unableToRemovePath=Unable to remove path ''{0}''
 unableToStore=Unable to store {0}.
 unableToWrite=Unable to write {0}

org.eclipse.jgit/src/org/eclipse/jgit/internal/JGitText.java

@@ -773,6 +773,7 @@ public class JGitText extends TranslationBundle {
 	/***/ public String tSizeMustBeGreaterOrEqual1;
 	/***/ public String unableToCheckConnectivity;
 	/***/ public String unableToCreateNewObject;
+	/***/ public String unableToReadPackfile;
 	/***/ public String unableToRemovePath;
 	/***/ public String unableToStore;
 	/***/ public String unableToWrite;

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/ObjectDirectory.java

@@ -360,7 +360,9 @@ public class ObjectDirectory extends FileObjectDatabase {
 					// The hasObject call should have only touched the index,
 					// so any failure here indicates the index is unreadable
 					// by this process, and the pack is likewise not readable.
-					LOG.warn("Unable to read packfile " + p.getPackFile(), e);
+					LOG.warn(MessageFormat.format(
+							JGitText.get().unableToReadPackfile,
+							p.getPackFile().getAbsolutePath()), e);
 					removePack(p);
 				}
 			}
@@ -653,7 +655,8 @@ public class ObjectDirectory extends FileObjectDatabase {
 		if ((e instanceof CorruptObjectException)
 				|| (e instanceof PackInvalidException)) {
 			warnTmpl = JGitText.get().corruptPack;
-			LOG.warn("Packfile " + p.getPackFile() + " is corrupted", e);
+			LOG.warn(MessageFormat.format(warnTmpl,
+					p.getPackFile().getAbsolutePath()), e);
 			// Assume the pack is corrupted, and remove it from the list.
 			removePack(p);
 		} else if (e instanceof FileNotFoundException) {