Adds an option to look for grafana dashboards in all namespaces

[GoelDeepak]

What type of PR is this?
Chore

What this PR does/ why we need it:
It enables grafana to look for all namespaces for grafana dashboards configmaps

[armandgrillet]

CI failure in https://teamcity.mesosphere.io/viewLog.html?buildId=2734250&buildTypeId=ClosedSource_Konvoy_KonvoyE2eAwsKba&tab=buildLog&_focus=22234 looks like the flake reported in https://jira.d2iq.com/browse/D2IQ-66636 and other tickets, I would suggest re-running Konvoy - e2e (aws).

Logs:

[[konvoy-e2e] Provisioning own clusters [aws][pull-request][OS] should create a cluster and upgrade it with AWS AMI - ubuntu1604] [2] Kubernetes cluster destroyed successfully!
[14:44:28][[konvoy-e2e] Provisioning own clusters [aws][pull-request][OS] should create a cluster and upgrade it with AWS AMI - ubuntu1604] [2] 
[14:44:28][[konvoy-e2e] Provisioning own clusters [aws][pull-request][OS] should create a cluster and upgrade it with AWS AMI - ubuntu1604] /root/src/github.com/mesosphere/konvoy/tests/e2e/provisioning.go:285
[14:44:28]
[[konvoy-e2e] Provisioning own clusters [aws][pull-request][OS] should create a cluster and upgrade it with AWS AMI - ubuntu1604] error running up: exit status 1
Unexpected error:
    <*exec.ExitError | 0xc000745ca0>: {
        ProcessState: {
            pid: 15886,
            status: 256,
            rusage: {
                Utime: {Sec: 0, Usec: 180000},
                Stime: {Sec: 0, Usec: 44000},
                Maxrss: 100280,
                Ixrss: 0,
                Idrss: 0,
                Isrss: 0,
                Minflt: 12970,
                Majflt: 0,
                Nswap: 0,
                Inblock: 0,
                Oublock: 16,
                Msgsnd: 0,
                Msgrcv: 0,
                Nsignals: 0,
                Nvcsw: 3280,
                Nivcsw: 644,
            },
        },
        Stderr: nil,
    }
    exit status 1
occurred
/root/src/github.com/mesosphere/konvoy/tests/e2e/functions.go:1262

[armandgrillet]

LGTM, the change in test/go.sum is unexpected but shouldn't be an issue.

[gracedo]

Were you able to confirm if this works? I know it's always been a limitation in the prometheus-operator chart vs standalone grafana chart that the grafana sidecar is only able to pull in dashboards from the same namespace. It's possible the docs just haven't been updated (seen this before with other options..) but if you verified that it works then +1!

[GoelDeepak]

yeah, I have verified and it works. :)