[SSSD] [PATCH] SDAP: rename SDAP_CACHE_PURGE_TIMEOUT

[Pavel Reichl]

Hello, please see trivial patch attached.

While I was investigating case I found that to access value of 
'ldap_purge_cache_timeout'  option I need to use enum value 
SDAP_CACHE_PURGE_TIMEOUT. I consider this to be a bad name (swap of 
cache and purge) as I took me additional time to find this out. I think 
that proposed name is better.

Unless somebody feels strongly against the patch I think it could be 
reviewed by our new colleague.

Thanks!