Raise if parsing, rendering, or writing fails
Raise if parsing, rendering, or writing fails

If jinja template parsing, rendering, or writing fails, we used to log
an error message and continue.  With this change, we'll raise the
original exception so we print the traceback and fail the build right
away.

Change-Id: I9e92d3aed844d965a425c43c79a8844e5c4bd006

openstack/api-site,openstack/api-site,openstack/api-site,openstack/api-site