Add prometheus to formalas install

* add prometheus to formulas install as without it models are broken
* Add repo variable to repo for formulas

Change-Id: I781dcd1c268dea9a5bf4f3d06f917faa04abadeb
Reviewed-on: https://review.gerrithub.io/362549
Reviewed-by: Dennis Dmitriev <dis.xcom@gmail.com>
Tested-by: Dennis Dmitriev <dis.xcom@gmail.com>
diff --git a/tcp_tests/templates/virtual-mcp-ocata-ovs/salt.yaml b/tcp_tests/templates/virtual-mcp-ocata-ovs/salt.yaml
index 868a2e8..a1037d7 100644
--- a/tcp_tests/templates/virtual-mcp-ocata-ovs/salt.yaml
+++ b/tcp_tests/templates/virtual-mcp-ocata-ovs/salt.yaml
@@ -133,7 +133,7 @@
 - description: Configure reclass
   cmd: |
     FORMULA_PATH=${FORMULA_PATH:-/usr/share/salt-formulas};
-    FORMULA_REPOSITORY=${FORMULA_REPOSITORY:-deb [arch=amd64] http://apt-mk.mirantis.com/xenial stable salt};
+    FORMULA_REPOSITORY=${FORMULA_REPOSITORY:-deb [arch=amd64] http://apt-mk.mirantis.com/xenial {{ REPOSITORY_SUITE }} salt};
     FORMULA_GPG=${FORMULA_GPG:-http://apt-mk.mirantis.com/public.gpg};
     which wget > /dev/null || (apt-get update; apt-get install -y wget);
     echo "${FORMULA_REPOSITORY}" > /etc/apt/sources.list.d/mcp_salt.list;