Add log streaming test

Test that our finger log streamer will correctly find the log file
and stream its contents to a client.

Change-Id: Ia153e2d436855dcce256d5fc91d0fd4c47116042
diff --git a/tests/fixtures/config/streamer/main.yaml b/tests/fixtures/config/streamer/main.yaml
new file mode 100644
index 0000000..208e274
--- /dev/null
+++ b/tests/fixtures/config/streamer/main.yaml
@@ -0,0 +1,8 @@
+- tenant:
+    name: tenant-one
+    source:
+      gerrit:
+        config-projects:
+          - common-config
+        untrusted-projects:
+          - org/project