Move the inline init script used for slave startup to bzr branch

[Deepti B. Kalakeri]

ci* uses inline init script for slave startup. This becomes very difficult to manage the init script. We should move the init scripts to bzr branch.

[Paul Sokolovsky (pfalcon)]

One obvious drawback for having inline scripts instead of bzr'ed is that we can' track changes to them properly, can't reuse across slaves, etc.

But it also affects us with https://blueprints.launchpad.net/linaro-ci/+spec/switch-ci-to-use-custom-ami - we need a way to reference slave init code externally to be able to use it in (automated) AMI creation.

[Deepti B. Kalakeri (deeptik)]

Deployed the init scripts stored in bzr branch on the ci.linaro.org slave init and did a round of testing and it works well.

[Deepti B. Kalakeri (deeptik)]

Sample job execution started after deploying the bzr init scripts and using the same slaves in the job https://ci.linaro.org/jenkins/job/precise-armhf-developer_sandbox/26/console.