Disable Gitweb for in-memory acceptance tests

Acceptance tests run in-memory if the @UseLocalDisk annotation is not
used and therefore, there is no gerrit_site. If Gitweb is installed,
it will be automatically configured and its configuration file will be
written in the gerrit_site/tmp folder. Disable Gitweb for in-memory
acceptance tests otherwise we end up with a UNIT_TEST_GERRIT_SITE/tmp
folder that is not cleaned up after the tests.

Change-Id: Ie3e55313cb8e9e4af53b0fb6f12f6bb6a80f1d7a
diff --git a/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/GerritServer.java b/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/GerritServer.java
index 7ea9971..34c5dd4 100644
--- a/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/GerritServer.java
+++ b/gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/GerritServer.java
@@ -71,6 +71,7 @@
       cfg.setBoolean("httpd", null, "requestLog", false);
       cfg.setBoolean("sshd", null, "requestLog", false);
       cfg.setBoolean("index", "lucene", "testInmemory", true);
+      cfg.setString("gitweb", null, "cgi", "");
       daemon.setEnableHttpd(enableHttpd);
       daemon.setLuceneModule(new LuceneIndexModule(
           ChangeSchemas.getLatest().getVersion(),