Update to correct in_index

Update defaults to use correct in_index per advice here.

Fixes #353

Signed-off-by: Ruth Cheesley <ruth.cheesley@acquia.com>

default-grimoirelab-settings/setup-secured.cfg

@@ -144,6 +144,6 @@ in_index = git_demo_raw
 out_index = git-aoc_demo_enriched
 
 [enrich_onion:git]
-in_index = git-aoc_demo_enriched
+in_index = git
 out_index = git-onion_demo_enriched
 contribs_field = hash