Move common parts of salt deployment into shared-salt.yaml

- most of common steps for bootstrapping salt moved to
  shared-salt.yaml
- default value REPOSITORY_SUITE changed to 'testing'

Change-Id: I7bd66b8e84d266ddd424b788d2a1b5ff0c6ecad4
Reviewed-on: https://review.gerrithub.io/373554
Reviewed-by: Dennis Dmitriev <dis.xcom@gmail.com>
Tested-by: Dennis Dmitriev <dis.xcom@gmail.com>
diff --git a/tcp_tests/templates/virtual-mcp11-k8s-calico/underlay.yaml b/tcp_tests/templates/virtual-mcp11-k8s-calico/underlay.yaml
index 186f4f0..5228550 100644
--- a/tcp_tests/templates/virtual-mcp11-k8s-calico/underlay.yaml
+++ b/tcp_tests/templates/virtual-mcp11-k8s-calico/underlay.yaml
@@ -1,5 +1,5 @@
 # Set the repository suite, one of the: 'nightly', 'testing', 'stable', or any other required
-{% set REPOSITORY_SUITE = os_env('REPOSITORY_SUITE', 'stable') %}
+{% set REPOSITORY_SUITE = os_env('REPOSITORY_SUITE', 'testing') %}
 
 {% import 'virtual-mcp11-k8s-calico/underlay--meta-data.yaml' as CLOUDINIT_META_DATA with context %}
 {% import 'virtual-mcp11-k8s-calico/underlay--user-data-cfg01.yaml' as CLOUDINIT_USER_DATA_CFG01 with context %}