IA update: Update access and control section

This is the fifth commit of the information architecture changes and
has the following changes:

- The icon for access and control has been updated
- Acc

IA update: Update access and control section

This is the fifth commit of the information architecture changes and
has the following changes:

- The icon for access and control has been updated
- Access and control section has been updated to security and
access section
- Security settings page has been updated to policies page and moved to
security and access section
- Client sessions page has been updated to sessions page
- Local user management page has been updated to user management page
- SSL certificates page has been updated to certificates page

Signed-off-by: Sandeepa Singh <sandeepa.singh@ibm.com>
Change-Id: Ie93cee9002742ecf7d33615636f4f159f4395fc4

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