Log more information when poll-sip fails
Clarify stderr and stdout
Merge pull request #97 from Metaswitch/poll_sprout_correlation

[Reviewer: Ellie] Log more information when poll-sip fails
Use UTC is crash dump filename
Make upstream_hostname match sprout_hostname (fixes #98)
Merge pull request #99 from Metaswitch/iss98

[Reviewer: Andy] Make upstream_hostname match sprout_hostname (fixes #98)
Merge branch 'iss92'
Rebase snmp-alarms to 56
Finish rebase to 56