Push setup() code down into TPG from Target
Push setup() code down into TPG from Target

Add a setup() classmethod to TPG, and push down all the code that is
for TPG (and sub-objects) into it. This helps Target.setup() be much
more understandable.

Signed-off-by: Andy Grover <b7d524d2f5cc5aebadb6b92b08d3ab26911cde33@redhat.com>

cvubrugier/rtslib-fb,agrover/rtslib-fb,mikenawrocki/rtslib-fb,mikenawrocki/rtslib-fb