Update fetch_packer_bosh

Clone and compile new packer-bosh instead of relying on pre-built
packer-bosh in S3.

Signed-off-by: Maria Shaldibina <mshaldibina@pivotal.io>
Specify stemcell os name for ci-box-bats

Signed-off-by: Maria Shaldibina <mshaldibina@pivotal.io>
Specify stemcell os name for ci-aws-bats

Signed-off-by: Maria Shaldibina <mshaldibina@pivotal.io>
Set permissions on ~/.ssh and authorized_keys

Signed-off-by: Maria Shaldibina <mshaldibina@pivotal.io>
Set /vagrant to 775

Signed-off-by: Maria Shaldibina <mshaldibina@pivotal.io>
wip

Signed-off-by: Andrea Law <alaw@pivotallabs.com>
Signed-off-by: Maria Shaldibina <mshaldibina@pivotal.io>
fixup! Set /vagrant to 775

Signed-off-by: Maria Shaldibina <mshaldibina@pivotal.io>