Modified upstart config to ensure proper log perms.
Modified Upstart config to grant correct permissions to agent logs.
Merge branch 'master' of https://github.com/juju/juju into 1286518-log-perms-2
Updated tests to reflect use of script.
Corrected search for exec block to work with new script block.
Finally got tests working. Removed unnecessary panic.
Merge branch 'master' of https://github.com/juju/juju into 1286518-log-perms-2

Conflicts:
	environs/cloudinit/cloudinit_test.go
Merge pull request #245 from katco-/1286518-log-perms-2

1286518 log perms 2