Doc needs update for security context

[swpoulin]

I edited the cr.yaml to add a few more targets, at start up the tc8-operator pod log reported:
Unable to continue with install: could not get information about the resource:
clusterrolebindings.rbac.authorization.k8s.io "turbo-all-binding"
is forbidden:
User "system:serviceaccount:turbonomic:t8c-operator" cannot get resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope","stacktrace":"sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2.2\n\t/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.10.0/pkg/internal/controller/controller.go:227"}

I found I had to do both commands below to get past this:
oc adm policy add-scc-to-group anyuid system:serviceaccounts:turbonomic
oc create clusterrolebinding turbonomic-admin --clusterrole=cluster-admin --serviceaccount=turbonomic:t8c-operator

[esara]

@swpoulin the t8c-operator is intended to install the turbonomic platform only on Openshift with minimal/required permissions
for security context, please refer to https://github.com/turbonomic/t8c-install/wiki/4.-Turbonomic-Multinode-Deployment-Steps#openshift-security-context

kubeturbo should be installed using the kubeturbo-operator instead of adding cluster admin to the turbonomic operator, for documentation please refer to https://github.com/turbonomic/kubeturbo/wiki/OpenShift-Operator-Hub-Details