Description of problem:
Under the Infrastructure -> Capsules section when you click on the Documentation button you get sent to a non-existent document

Version-Release number of selected component (if applicable):
6.4

How reproducible:
Always

Steps to Reproduce:
1. From WebUI, select: Infrastructure -> Capsules
2. Click Documentation

Actual results:
Links to:
https://access.redhat.com/documentation/en-us/red_hat_satellite/6.4/html/installation_guide/installing_capsule_server

Expected results:
Links to:
https://access.redhat.com/documentation/en-us/red_hat_satellite/6.4/html/installing_capsule_server

Additional info:
The documentation guide for Capsule servers was moved from the main Installation Guide into it's own separate guide, it is no longer under:
/installation_guide/installing_capsule_server
But now under:
/installing_capsule_server