020-iotdm-mini.robot fails to connect to iotdm server during Jenkins invocation.

Robot test case fails when connecting to iotdm server.

Problem notices with the message in the log stating:

"Starting new HTTP connection (1): localhost"

Server name is currently localhost but should be ${CONTROLLER} to properly connect to MININET.

Also troubling that the failure message in the log is:

"TypeError: a float is required"

Which means the iotdm connection failed but caused a failure later in the test.