Remove dump directory workaround

Removes special symlink for dump directory
that was put in place for nginx and
mcollective containers.

Change-Id: I519808013460a6ee27f00a955c0eff5e3a1316a0
Closes-Bug: #1337779
Related-Bug: #1332496
Merge "Remove dump directory workaround"
Upgrades, now user can specify --no-rollback or --no-checker parameters

Closes-bug: #1338538
blueprint upgrade-to-5-1

Change-Id: I6663a4f8a66c2519cec2c03002e688b341b2fd51
Upgrades, fix error message formatting

In prepare_upgrade_files function was
wrong strings concatination. As result
user saw bash errors when he run the
script.

Closes-bug: #1337937
blueprint upgrade-to-5-1

Change-Id: Iaf734aac537f07c10811a382cbe90c2fe7f8f393
Building OS images centos and ubuntu

Those images are supposed to be used for
image based provisioning.

Implements: blueprint image-based-provisioning
Change-Id: I4f038c99d4caf7d2b6e291bff29572b3a45d92c7