Create Router form missing router types from nsxv-router-type extension

[Janet Yu]

The nsxv-router-type Neutron extension lets users create exclusive and shared routers. These options are not available from the Router Type dropdown of the Create Router form that is shown to the admin user.

CLI examples:
neutron router-create X --router-type exclusive
neutron router-create X --router-type shared

[Akihiro Motoki (amotoki)]

nsxv-router-type neutron extension is a vendor-specific extension and horizon does not take care of vendor-specific feature in general.

In addition, neutron supports L3 flavor now (as of Queens). This kind of feature should be built on top of L3 flavor feature (in the neutron and vendor plugin side) and horizon can support L3 flavor feature.

From the above observation, the direct support of router types requested in this bug does not fit the project plan.