Adding the following accross the project:

```bash
/# exit immediately when a command fails
set -e
/# only exit with zero if all commands of the pipeline exit successfully
set -o pipefail
/# error on unset variables
+set -u

```

kube-prometheus: Allow skipping etcd TLS errors

This commit bumps the version of the Prometheus Operator jsonnet
dependency in kube-prometheus. With this change, kube-prometheus now
supports Prometheus Operator v0.23.0.

add serviceMonitorNamespaceSelector to the prometheus jsonnet library

to implement the feature from PR #1227

Assign the rolebinding to an existing serviceaccount

kube-prometheus: Fix jsonnet lock file

Prune/jsonnet namespace roles

*/README.md: Include 'Contributing' section

By default if a new object (servicemonitor, secret, ...) is created /
updated / deleted, we reconcile all Prometheus instances in that
namespace. In addition we also need to reconcile all Prometheus
instances selecting objects (ServiceMonitors, PrometheusRules) in that
namespace.

Merge remote-tracking branch 'origin/prune/jsonner-namespace-roles' into prune/jsonner-namespace-roles

replaced default namespaces rbac rules by a loop


set right variable name

Change-Id: I589eb7b007f9ac035936c95eaa818497607038bc

Change-Id: I54f6f26449b0f16b7be2f202ec93e7c29a377108

Change-Id: I85f679ea7a33febf5d730960bf754f4b459f53d3

adjust rbac apiGroups to support core workloads api apps/v1