Print nats log when test fail on timeout

To debug when agents are failing because they fail to connect to nats

Signed-off-by: Maria Shaldibina <mariash@pivotallabs.com>
Update travis:install_go

- download into ./go
- install into ./go/gobin

[#76620970]

Signed-off-by: Andrea Law <alaw@pivotallabs.com>
Use official trusty sources for stemcell-building VM

* Amazon EC2 trusty sources are unreliable and fail with "Hash Sum Mismatch"

Signed-off-by: Adam Stegman <astegman@pivotallabs.com>
Update OS_IMAGES.md with latest

Signed-off-by: Adam Stegman <astegman@pivotallabs.com>
Merge final release for build 2685 to develop
Clean up /etc/resolconf/resolv.conf.d files

resolvconf populates /etc/resolv.conf from files in /etc/resolvconf/resolv.conf.d
Make sure to clean up these files at the end of stemcell build

Signed-off-by: Maria Shaldibina <mariash@pivotallabs.com>
Bump go-agent

Signed-off-by: Maria Shaldibina <mariash@pivotallabs.com>
open temp file as binary to suppress LF->CRLF conversion on Windows
Assert that each gem only has one version

When bumping gem versions, if there is more than one version file, we might
bump the wrong one and cause a build failure.

Signed-off-by: Adam Stegman <astegman@pivotallabs.com>
Adding final release for build 2686