Don't use deprecated LockFile constructor

Change-Id: I1e9633b6c179b076f12d494c85508b3ea8a8da96
diff --git a/src/main/java/com/googlesource/gerrit/plugins/importer/CompleteProjectImport.java b/src/main/java/com/googlesource/gerrit/plugins/importer/CompleteProjectImport.java
index c108e08..8d2c0f3 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/importer/CompleteProjectImport.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/importer/CompleteProjectImport.java
@@ -38,7 +38,6 @@
 import org.eclipse.jgit.lib.Ref;
 import org.eclipse.jgit.lib.RefUpdate;
 import org.eclipse.jgit.lib.Repository;
-import org.eclipse.jgit.util.FS;
 
 import java.io.File;
 import java.io.IOException;
@@ -77,7 +76,7 @@
   private LockFile lockForDelete(Project.NameKey project)
       throws ResourceConflictException {
     File importStatus = projects.FS_LAYOUT.getImportStatusFile(project.get());
-    LockFile lockFile = new LockFile(importStatus, FS.DETECTED);
+    LockFile lockFile = new LockFile(importStatus);
     try {
       if (lockFile.lock()) {
         return lockFile;
diff --git a/src/main/java/com/googlesource/gerrit/plugins/importer/ImportProject.java b/src/main/java/com/googlesource/gerrit/plugins/importer/ImportProject.java
index 39d1868..0e7d44a 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/importer/ImportProject.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/importer/ImportProject.java
@@ -47,7 +47,6 @@
 import org.eclipse.jgit.lib.ProgressMonitor;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.lib.TextProgressMonitor;
-import org.eclipse.jgit.util.FS;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -302,7 +301,7 @@
 
   private LockFile lockForImport() throws ResourceConflictException {
     File importStatus = projects.FS_LAYOUT.getImportStatusFile(targetProject.get());
-    LockFile lockFile = new LockFile(importStatus, FS.DETECTED);
+    LockFile lockFile = new LockFile(importStatus);
     try {
       if (lockFile.lock()) {
         return lockFile;