Is there a list of valid properties for avatica's OpenConnectionRequest info map?

[F21]

The protobuf documentation for avatica says we can send a map along with 
the connection id when using an OpenConnectionRequest: 
https://calcite.apache.org/docs/avatica_protobuf_reference.html#openconnectionrequest

Is there a list of keys that can go into the map? Perhaps this should be 
better documented.

I tried sending a map (shown in JSON, but I was sending the golang 
protobuf equivalent):
{
    "auto_commit":           "true",
    "has_auto_commit":       "true",
    "transaction_isolation": "8",
}

However, the connection was not opened with auto_commit set to true.