cman: Return an error if 'cman_tool leave' is attempted during shutdown
cman: Return an error if 'cman_tool leave' is attempted during shutdown

There were some occasions when 'cman_tool leave' simply returned success
even though shutdown had already started. This fixes those.

Signed-off-by: Christine Caulfield <992cedbe1eac7dbaff482fcb880a50b57e6b8062@redhat.com>

stevenraspudic/resource-agents,stevenraspudic/resource-agents,asp24/resource-agents,asp24/resource-agents,asp24/resource-agents,stevenraspudic/resource-agents