Re-enable test_connection tests

Re-enable the TestGerritConnection and TestConnections test cases.

Change-Id: I23c12b23546102212990b2dca7369741efa990b6
diff --git a/tests/fixtures/config/zuul-connections-same-gerrit/main.yaml b/tests/fixtures/config/zuul-connections-same-gerrit/main.yaml
new file mode 100644
index 0000000..90297fb
--- /dev/null
+++ b/tests/fixtures/config/zuul-connections-same-gerrit/main.yaml
@@ -0,0 +1,8 @@
+- tenant:
+    name: tenant-one
+    source:
+      review_gerrit:
+        config-repos:
+          - common-config
+        project-repos:
+          - org/project