Install Experiment: Host not specified

[lenerd]

Hi, I have deployed instances (for the BMR protocol). When I try to install the experiment, I get the following error from fabric:

 Fatal error: Needed to prompt for the target host connection string (host: None), but input would be ambiguous in parallel mode

This happenes here: https://github.com/cryptobiu/MATRIX/blob/92cc27b504d4e7fa48dedfe0194e2633b375bc8e/Execution/end_to_end.py#L28-L29

If I drop the --parallel from the command line, I get asked to provide a host:

No hosts found. Please specify (single) host string for connection: 

Shouldn't this happen automatically?

[liorko87]

Same as #13. Spot requests didn't tag during creation.