Adapt to changes in Gerrit core

Change Icf3108d45f adds a new exception to the
ReviewersUtil#suggestReviewers method that needs to be handled.

Change-Id: I0d1f52e55a7d8afa54370c757aaf2d9d477d1d82
Signed-off-by: Edwin Kempin <ekempin@google.com>
diff --git a/src/main/java/com/googlesource/gerrit/plugins/reviewers/SuggestProjectReviewers.java b/src/main/java/com/googlesource/gerrit/plugins/reviewers/SuggestProjectReviewers.java
index 4212e61..052cac8 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/reviewers/SuggestProjectReviewers.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/reviewers/SuggestProjectReviewers.java
@@ -26,6 +26,7 @@
 import com.google.gerrit.server.change.SuggestReviewers;
 import com.google.gerrit.server.config.GerritServerConfig;
 import com.google.gerrit.server.permissions.PermissionBackend;
+import com.google.gerrit.server.permissions.PermissionBackendException;
 import com.google.gerrit.server.permissions.ProjectPermission;
 import com.google.gerrit.server.project.ProjectResource;
 import com.google.gwtorm.server.OrmException;
@@ -54,7 +55,8 @@
 
   @Override
   public List<SuggestedReviewerInfo> apply(ProjectResource rsrc)
-      throws BadRequestException, OrmException, IOException, ConfigInvalidException {
+      throws BadRequestException, OrmException, IOException, ConfigInvalidException,
+          PermissionBackendException {
     return reviewersUtil.suggestReviewers(
         null, this, rsrc.getProjectState(), getVisibility(rsrc), true);
   }