qa_utils: Virtual cluster support for SSH commands
qa_utils: Virtual cluster support for SSH commands

In virtual clusters, all “gnt-*” and “ganeti-*” commands require
environment variables to be set for the virtual cluster root directory
and node name. The “cmd” script generated by “vcluster-setup” is a
wrapper setting those variables.

Signed-off-by: Michael Hanselmann <68b67885ff74281219b4a4be33cc20fd45078d7c@google.com>
Reviewed-by: Bernardo Dal Seno <dcdd79c5479cb9d1329ec01d126f02cb045aa103@google.com>

andir/ganeti,bitemyapp/ganeti,andir/ganeti,onponomarev/ganeti,grnet/snf-ganeti,ganeti-github-testing/ganeti-test-1,ganeti/ganeti,yiannist/ganeti,apyrgio/snf-ganeti,grnet/snf-ganeti,mbakke/ganeti,dimara/ganeti,leshchevds/ganeti,yiannist/ganeti,leshchevds/ganeti,andir/ganeti,bitemyapp/ganeti,ganeti-github-testing/ganeti-test-1,ganeti/ganeti,dimara/ganeti,ganeti/ganeti,apyrgio/ganeti,yiannist/ganeti,onponomarev/ganeti,apyrgio/ganeti,apyrgio/snf-ganeti,mbakke/ganeti,mbakke/ganeti,leshchevds/ganeti