Allow Managed Policy to attach to Individual Role

[mnkg561]

Is this a BUG REPORT or FEATURE REQUEST?:
Feature Request

What happened:
iam-manager allows attaching managed iam policies to all the roles and can not attach to individual role. Iam-manager should support attaching managed policy to individual roles as well.

What you expected to happen:
Managed policy can be attached to specific role

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

Environment:

• iam-manager version
• Kubernetes version :

$ kubectl version -o yaml

Other debugging information (if applicable):

- controller logs:

$ kubectl logs