Insights operator - 0/X nodes are available: X node(s) didn't match node selector

Issue

• Insights Operator pod cannot be scheduled on clusters with a default node selector, for example:

$ oc describe pod insights-operator-xxxxxx -n openshift-insights
[...]
  Events:
    Type     Reason            Age                    From               Message
    ----     ------            ----                   ----               -------
    Warning  FailedScheduling  118m (x25 over 118m)   default-scheduler  0/10 nodes are available: 10 node(s) didn't match node selector.
    Warning  FailedScheduling  118s (x121 over 117m)  default-scheduler  0/10 nodes are available: 10 node(s) didn't match node selector.