Don't write the processed template to filesystem
Don't write the processed template to filesystem

All the template processing and image building now passes around a
string representation of the TDL XML instead of writing it out to
/tmp/tdl and then reading it again.

This ensures that the template is not manipulated outside of heat-jeos
and provides greater modularity.

Signed-off-by: Tomas Sedovic <2bc6038c3dfca09b2da23c8b6da8ba884dc2dcc2@sedovic.cz>

sdake/heat-jeos,bbandaru/heat-cfntools,openstack/heat-cfntools,steveb/heat-cfntools,steveb/heat-cfntools