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>
10 files changed