CLOUDSTACK-7879: Skip dynamic scaling on vmware if vmware-tools are not installed

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>
CLOUDSTACK-7693: test_scale_vm.py - fix pep8 issues

CLOUDSTACK-7878: Skip scale VM operation on vmware if vmware tools are not installed

Signed-off-by: SrikanteswaraRao Talluri <talluri@apache.org>