(maint) Add more uniqueness to jobid and useful termination message

[sbeaulie]

Status

[Ready for Merge]

Description

Before this change there was a non zero chance that two requests could be received
at the same millisecond and have the same jobid. Added the username as a prefix
to the job id. Also returns a useful message when ctrl-c or terminating the app while
in the ABS loop.

Related Issues

Todos

• Tests
• Documentation

Reviewers

@puppetlabs/dio
@highb
@briancain

[sbeaulie]

here is an example of ctrl-c when the ABS loop is running

$ floaty get debian-8-x86_64
Requesting VMs with job_id: samuel-1602257755201.  Will retry for up to an hour.
Waiting 1 seconds to check if ABS request has been filled.  Queue Position: 265... (x1)
^C

Floaty interrupted, you can query the state of your request via
1) `floaty query samuel-1602257755201` or delete it via
2) `floaty delete samuel-1602257755201`