Merge branch '2592-support-for-non-https-pod-exporters' into 'master'

Support for non-https pod exporters

Closes #2592

See merge request !1754

files/gitlab-cookbooks/gitlab/libraries/prometheus.rb

@@ -270,7 +270,6 @@ module Prometheus
       k8s_pods = {
           'job_name' => 'kubernetes-pods',
-          'scheme' => 'https',
           'tls_config' => {
             'ca_file' => '/var/run/secrets/kubernetes.io/serviceaccount/ca.crt',
             'insecure_skip_verify' => true,

spec/chef/recipes/prometheus_spec.rb

@@ -70,7 +70,6 @@ prometheus_yml_output = <<-PROMYML
       target_label: environment
       regex: "(.+)-.+-.+"
   - job_name: kubernetes-pods
-    scheme: https
     tls_config:
       ca_file: "/var/run/secrets/kubernetes.io/serviceaccount/ca.crt"
       insecure_skip_verify: true