Name for impala interpreter is hardcoded

Bug reports
#1

Impala interpreter name is hardcoded to use only impala. This means in the web UI I cannot have any other names e.g: impala-live or data warehouse (Impala).

In the hue.ini changing the name= Impala under section notebook -> interpreters -> impala makes hue to ignore the connection properties defined and use defaults like 127.0.0.1

Issue encountered in hue version 4.7.0 (latest at the time of writing)

 [notebook]
    [[interpreters]]
      [[[impala]]]
         name = Impala
         interface=hiveserver2

  [impala]
    # Host of the Impala Server (one of the Impalad)
    server_host=impala-lb.myorg.io

    # Port of the Impala Server
    server_port=21050

    impersonation_enabled=true

    use_sasl=true
    querycache_rows=100

    [[ssl]]
      enabled=true
      validate=false
#2

Indeed, until " Configuration of connectors via UI HUE-8758" is in, Hue can point to only one Impala server.