Description of problem:

Non consistent Role Assignments tab title for the different related entities.

"Role Assignments" for Clusters

"Role assignments" for Roles and Identities

Version-Release number of selected component (if applicable): 2.15

How reproducible:

always

Steps to Reproduce:

1. Navigate to any cluster and check Role Assignments tab title
2. Navigate to any user/group/role and check Role assignments tab title

Actual results:

for cluster is title case, the rest is lowercase

Expected results:

consistency between the Role Assignments tabs for the different entities

Additional info: