Feature Request: nflow explorer capable of querying all executor groups

[RealZimboGuy]

Hi,

Looking at the possibility of extending the nflow api, such that the executor group can be sent from explorer to be "all" or a specific executor group. the thought of this is that.

you can have two executor groups on the same database ie nflow_one and nflow_two

from explorer you can select an executor group to view, at the moment you would need two nflow explorer instances connecting to the API for each executor group. but this could be useful to have one api/explorer to service both

the code in reference comes from the executor Dao in

    this.executorGroup = trimToNull(env.getRequiredProperty("nflow.executor.group")); 

to get this through would be an additional @RequestParam to the rest api in WorkflowInstanceResource.

then on nflow explorer, a new config to have a drop down list in the nav bar to select the executor group