Fix master build by adding extra import

Current Gerrit master is broken because the AccountIT test
is missing the import of ProjectConfig.

Fix the Gerrit master and allow the verifications to turn into
green again.

Change-Id: I32804c1c23680f45932fb87e089a868c670f4923
diff --git a/javatests/com/google/gerrit/acceptance/api/accounts/AccountIT.java b/javatests/com/google/gerrit/acceptance/api/accounts/AccountIT.java
index 6bf8aaf..e9beb90 100644
--- a/javatests/com/google/gerrit/acceptance/api/accounts/AccountIT.java
+++ b/javatests/com/google/gerrit/acceptance/api/accounts/AccountIT.java
@@ -111,6 +111,7 @@
 import com.google.gerrit.server.index.account.StalenessChecker;
 import com.google.gerrit.server.mail.Address;
 import com.google.gerrit.server.notedb.rebuild.ChangeRebuilderImpl;
+import com.google.gerrit.server.project.ProjectConfig;
 import com.google.gerrit.server.project.RefPattern;
 import com.google.gerrit.server.query.account.InternalAccountQuery;
 import com.google.gerrit.server.update.RetryHelper;