clean.sh updates

* Clean out data, log and state dirs
* Include lib/apache to clear is_apache_enabled_service not found error
* Clean errors removing tgt config files

* Clean errors removing VG backing file in lib/cinder

Change-Id: I33dfde17eb8daaaed7f7e76337fe6a8085a266bf
Add 'bc' to files/apts/general

After commit def4c141, "bc" command is used in stack.sh,
but 'bc' command is not available in very minimal Ubuntu
installation (without any tasks installed).
We need to add 'bc' to required package list.

Closes-Bug: #1272914
Change-Id: I5797707e8eaa9dd2a21d1a1fc3af028d1951a2ee
remove setting up fatal_deprecations

using fatal deprecations only means you can't add new deprecations
to the code base, which isn't helpful in actually deprecating
features in a user friendly way.

Change-Id: I26468f4c221a14f2eea746439d46e5fa192cfc57
Merge "clean.sh updates"
Merge "Add 'bc' to files/apts/general"
Merge "remove setting up fatal_deprecations"
Merge branch 'master' of github.com:openstack-dev/devstack