Add ProjectCache.remove()

We need a way to remove data from the project cache so that plugins can
do things such as delete projects.

Signed-off-by: Brad Larson <bklarson@gmail.com>
Change-Id: I37e2ca53614ccb8a06480f7a0a6d9a6884b0c3b5

gerrit-server/src/main/java/com/google/gerrit/server/project/ProjectCacheImpl.java

@@ -114,6 +114,20 @@ public class ProjectCacheImpl implements ProjectCache {
     }
   }
 
+  @Override
+  public void remove(final Project p) {
+    listLock.lock();
+    try {
+      SortedSet<Project.NameKey> n = list.get(ListKey.ALL);
+      n = new TreeSet<Project.NameKey>(n);
+      n.remove(p.getNameKey());
+      list.put(ListKey.ALL, Collections.unmodifiableSortedSet(n));
+    } finally {
+      listLock.unlock();
+    }
+    evict(p);
+  }
+
   @Override
   public void onCreateProject(Project.NameKey newProjectName) {
     listLock.lock();