Disable repository list caching in gitblit

Per the documentation, it's probably best to disable
this when repositories aren't managed by Gitblit

Change-Id: Ia9267ff165cb8fac05f9cc7214fe6947a37a6472

src/main/resources/com/googlesource/gerrit/plugins/gitblit/reference.properties

diff --git a/src/main/resources/com/googlesource/gerrit/plugins/gitblit/reference.properties b/src/main/resources/com/googlesource/gerrit/plugins/gitblit/reference.properties
index 76c59e7..88ae326 100644
--- a/src/main/resources/com/googlesource/gerrit/plugins/gitblit/reference.properties
+++ b/src/main/resources/com/googlesource/gerrit/plugins/gitblit/reference.properties
@@ -12,6 +12,17 @@
 # RESTART REQUIRED
 #git.repositoriesFolder = /Users/simone/Documents/workspace/gerritent/test/git
 
+# Build the available repository list at startup and cache this list for reuse.
+# This reduces disk io when presenting the repositories page, responding to rpcs,
+# etc, but it means that Gitblit will not automatically identify repositories
+# added or deleted by external tools.
+#
+# For this case you can use curl, wget, etc to issue an rpc request to clear the
+# cache (e.g. https://localhost/rpc?req=CLEARREPOSITORYCACHE)
+#
+# SINCE 1.1.0
+git.cacheRepositoryList = false
+
 # Search the repositories folder subfolders for other repositories.
 # Repositories MAY NOT be nested (i.e. one repository within another)
 # but they may be grouped together in subfolders.