When run tools/init-runonce without some client installed,it's
retrun not friendly and confuse people,such as user does not
install python-openstackclient, it will return "openstack not
installed".This patch update it.
Use "type" command to avoid "which"
TrivialFix
Change-Id: I53789a767b3a2727bf2cb848c2881272e313e14c