Revert API change for 2.9

This changes the ProjectInfo class back to its old location, which
allows the plugin to build with stable-2.9.  This does require the
v3.4.0 version of JGit to ensure it can register ArchiveFormat
(https://git.eclipse.org/r/24887).

Change-Id: I944998515e47bb18a08a46e32e738668111e5edf
Depends-On: I57e95d09e87a0eca53735638da2a0ebbf30d9349
Depends-On: Icb80a446e583961a7278b707d572d6fe456c372c

src/main/java/com/googlesource/gerrit/plugins/gitiles/GerritGitilesAccess.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/gitiles/GerritGitilesAccess.java b/src/main/java/com/googlesource/gerrit/plugins/gitiles/GerritGitilesAccess.java
index 8266242..173e709 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/gitiles/GerritGitilesAccess.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/gitiles/GerritGitilesAccess.java
@@ -15,7 +15,6 @@
 package com.googlesource.gerrit.plugins.gitiles;
 
 import com.google.common.collect.Maps;
-import com.google.gerrit.extensions.common.ProjectInfo;
 import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.IdentifiedUser;
@@ -23,6 +22,7 @@
 import com.google.gerrit.server.project.ListProjects;
 import com.google.gerrit.server.project.ProjectCache;
 import com.google.gerrit.server.project.ProjectJson;
+import com.google.gerrit.server.project.ProjectJson.ProjectInfo;
 import com.google.gerrit.server.project.ProjectState;
 import com.google.gitiles.GitilesAccess;
 import com.google.gitiles.GitilesUrls;