Fix consul init values when running docker

Fixes CNVS-31618

Test plan:
1. copy the updated config/consul.yml into your config directory
2. make sure api specs pass in docker
(eg docker-compose run --rm web rspec spec/apis/v1/grading_periods_api_spec.rb)

Change-Id: Ib80c01d2770c216aa846362e3ea2efbfde5f5e63
Reviewed-on: https://gerrit.instructure.com/89692
Reviewed-by: Derek Bender <djbender@instructure.com>
Reviewed-by: Shahbaz Javeed <sjaveed@instructure.com>
Tested-by: Jenkins
QA-Review: Derek Bender <djbender@instructure.com>
Product-Review: Neil Gupta <ngupta@instructure.com>

docker-compose/config/consul.yml

@@ -4,10 +4,13 @@ production:
   ssl: true
   acl_token: "xxxxxxxx-yyyy-zzzz-1111-222222222222"
 test:
-  host: some.domain
+  host: consul
   port: 8500
   ssl: false
   init_values:
+    canvas:
+      signing-secret: somebigsecret
+      encryption-secret: somebigsecret
     rich-content-service:
       app-host: rce.docker
       cdn-host: rce.docker
@@ -16,6 +19,9 @@ development:
   port: 8500
   ssl: false
   init_values:
+    canvas:
+      signing-secret: somebigsecret
+      encryption-secret: somebigsecret
     rich-content-service:
       app-host: rce.docker
       cdn-host: rce.docker