qa_crowbarsetup: cleanup floating IPs

this is to avoid resource leaks to be able to run the script regularly
Make installation of SLE12 nodes optional

And default to off, since it doesn't work yet.
Change order of setting networking_mode/network_plugin

Otherwise setting linuxbridge will cause a warning that
linuxbridge can not be used with GRE.
Disable Nova v3 related tests for Cloud 5

They're currently not enabled in tempest for Juno
upstream, and they're failing completely. there
is not much use in enabling testing of them at
this point imho.
Fix exit code handling of suse-cloud-upgrade

Store the exit code of suse-cloud-upgrade in a local variable otherwise will
just return the exit code of the "echo" command.
Use packaged suse-cloud-upgrade instead of git checkout
Merge pull request #116 from rhafer/suse-cloud-upgrade

Fixes for suse-cloud-upgrade
qa_crowbar: Detect TESTHEAD also for local repos

Add possibility to use the staging packages when using
local repositories.
fix connection to jenkins api
new example for jenkinsapi.cred file
fix japi to access jenkins instances
docs: Document local repository usage

Add an example howto setup a cloud with mkcloud and locally
synced repositories.
[ci.o.o] remove obsolete jenkins jobs
[ci.o.o] latest job changes
Merge pull request #117 from toabctl/document-local-repos

docs: Document local repository usage
[r.s.d] latest job changes
[r.s.d] archive also the trigger jobs
fix typo in japi and jenkins-job-trigger
fix typo in jenkins-job-trigger script
qa_crowbarsetup: check for empty IP addr