mkcloud: add wipe option

usage: wipe=1 mkcloud cleanup
this gets rid of the created volume-group
mkcloud: allow parallel runs
Still add/remove tarballs when using changesgenerate from tar_scm
Merge pull request #28 from vuntz/fix-trackupstream

Still add/remove tarballs when using changesgenerate from tar_scm
mkcloud: workaround bnc#845496 to fix linuxbridge
mkcloud: fix supportconfig gathering with parallel runs
Restore formatting of the combination filter

Please do not edit in the webui, ever.
Raise timeout for initial Crowbare UI Access

first access of Crowbar UI got really slow with the
bootstrap integration.
20 s is not enough, raise to 1m
29s should be enough..
qa_crowbarsetup: make instcrowbar a function
qa_crowbarsetup: split installcrowbar into prepare and install phase
qa_crowbarsetup: make allocate also a function
mkcloud: insert prepareinstallcrowbar step
mkcloud: Do not fail after allocating

The return value of the new allocate function was 1, because grep didn't
find anything -- but that really means we're good ;-)
Merge pull request #29 from vuntz/fix-mkcloud

mkcloud: Do not fail after allocating
fix check if file exists, fix indentation
support to run install-chef-suse from git
mkcloud step to run install-chef-suse from git
make sure that crowbar is running

it may not be started when it is installed from git