mkcloud: deduplicate ssh key filename
qa_crowbarsetup.sh: Add CI for trove
mkcloud: Avoid hang on collecting supportconfig

If the cloud install went really berserk, the supportconfig
run will hang endlessly, blocking further jobs. Timeout
after a while.
mkcloud: drop obsolete supportconfig workaround

https://bugzilla.novell.com/show_bug.cgi?id=829927
Rework the substitution pattern for cloud upgrade

Just replacing 3 with 4 replaces too much. E.g. SLE11-SP3 -> SLE11-SP4.
Restrict it to just replace the cloud version.
Use --gpg-auto-import-keys --no-gpg-checks for zypper during upgrade testing

To avoid complaints about unsigned Cloud-PTF repo
No need to install crowbar-barclamp-trove during upgrade-test

suse-cloud-upgrade takes care about that already