Move collection specs into model_controller_spec

[#72663842]

Signed-off-by: Eric Malm <emalm@pivotallabs.com>
Move creation shared examples into model_controller_spec

[#72663842]

Signed-off-by: Eric Malm <emalm@pivotallabs.com>
Move updating shared examples into model_controller_spec

[#72663842]

Signed-off-by: Eric Malm <emalm@pivotallabs.com>
Move deletion shared examples into model_controller_spec

[#72663842]

Signed-off-by: Eric Malm <emalm@pivotallabs.com>
Move enumeration shared examples into model_controller_spec

[#72663842]

Signed-off-by: Eric Malm <emalm@pivotallabs.com>