Moved pruning of non-districted/non-zone nodes(when districted/zone nodes are available) from rpc_find_all_available to select_best_fit_node.
Rationale: Node selection plugin should have flexibility to choose any candidate node from non-districted/districted/non-zone/zone nodes.
Merge pull request #5185 from pravisankar/dev/ravi/fix-node-selection

Merged by openshift-bot
Fixing error message around submodule repo