Remove controller specs which are testing model behavior

Also consolidated some fine-grained shared specs so avoid re-running expensive befores

[#72663842]

Signed-off-by: Joseph Palermo <jpalermo@pivotallabs.com>
Remove ControllerExamples module as it does not actually scope the shared examples

Signed-off-by: Joseph Palermo <jpalermo@pivotallabs.com>
Remove ModelExamples module as it does not actually scope the shared examples

- Extract RelationTypes into a new module

Signed-off-by: Joseph Palermo <jpalermo@pivotallabs.com>