Close Repository objects in GitRepoMetricsCacheIT

The Repository objects created in the setup of the tests
need to be closed to prevent false positives of resource
leaks.

Change-Id: I9d40223ad656d39d5ec158d81892b03d4d4bcabc

src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/GitRepoMetricsCacheIT.java

diff --git a/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/GitRepoMetricsCacheIT.java b/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/GitRepoMetricsCacheIT.java
index 4eee736..828819a 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/GitRepoMetricsCacheIT.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/GitRepoMetricsCacheIT.java
@@ -52,8 +52,8 @@
   public void setUpTestPlugin() throws Exception {
     super.setUpTestPlugin();
 
-    repoManager.createRepository(testProject1);
-    repoManager.createRepository(testProject2);
+    repoManager.createRepository(testProject1).close();
+    repoManager.createRepository(testProject2).close();
     gitRepoMetricsCache = plugin.getSysInjector().getInstance(GitRepoMetricsCache.class);
     fsMetricsCollector = plugin.getSysInjector().getInstance(FSMetricsCollector.class);
     gitStatsMetricsCollector = plugin.getSysInjector().getInstance(GitStatsMetricsCollector.class);