Update to Swagger UI v5.11.8

Update to Swagger UI v5.11.8

Updated Swager UI from 5.9.0 to latest current version:
https://github.com/swagger-api/swagger-ui/releases/tag/v5.10.0
https://github.com/swagger-api/swagger-ui/releases/tag/v5.11.0
https://github.com/swagger-api/swagger-ui/releases/tag/v5.11.1
https://github.com/swagger-api/swagger-ui/releases/tag/v5.11.2
https://github.com/swagger-api/swagger-ui/releases/tag/v5.11.3
https://github.com/swagger-api/swagger-ui/releases/tag/v5.11.4
https://github.com/swagger-api/swagger-ui/releases/tag/v5.11.5
https://github.com/swagger-api/swagger-ui/releases/tag/v5.11.6
https://github.com/swagger-api/swagger-ui/releases/tag/v5.11.7
https://github.com/swagger-api/swagger-ui/releases/tag/v5.11.8

All ODL adjustments perserved.

JIRA: NETCONF-1255
Change-Id: I17600e718e9748027579ff2d82929c39af6db409
Signed-off-by: Oleksandr Zharov <oleksandr.zharov@pantheon.tech>