[Samba] Change (fix) idmap config

[Lorenzo Milesi]

> Sorry, I keep forgetting this, you need to clear the cache with 'net
> cache flush'

Ok, I made the switch but one more thing. As soon as I restart smb+nmb+winbind the "domain users" group has this id:
# getent group "domain users"
domain users:x:10513:
after a few seconds, the ID is "restored" to the wrong one:
# getent group "domain users"
domain users:x:700009:

I don't have a custom id set in the group:
# samba-tool group show "domain users"
dn: CN=Domain Users,CN=Users,DC=wdc,DC=domain,DC=it
objectClass: top
objectClass: group
cn: Domain Users
description: All domain users
instanceType: 4
whenCreated: 20220715153450.0Z
whenChanged: 20220715153450.0Z
uSNCreated: 5074
name: Domain Users
objectGUID: 32bbb713-c5de-4d05-bb5a-25ee53e6971f
objectSid: S-1-5-21-1322844432-1368091937-3368753673-513
sAMAccountName: Domain Users
sAMAccountType: 268435456
groupType: -2147483646
objectCategory: CN=Group,CN=Schema,CN=Configuration,DC=wdc,DC=domain,DC=it
isCriticalSystemObject: TRUE
uSNChanged: 5264
memberOf: CN=Users,CN=Builtin,DC=wdc,DC=domain,DC=it
distinguishedName: CN=Domain Users,CN=Users,DC=wdc,DC=domain,DC=it

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Lorenzo Milesi - lorenzo.milesi at yetopen.com 
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