s4:dsdb - fix unsigned integer save problems using the "%u" specifier

s4:dsdb - fix unsigned integer save problems using the "%u" specifier

The issue here is that we have not yet first cast to int32_t explicitly,
before we cast to an signed int to printf() into the %d or cast to a
int64_t before we then cast to a long long to printf into a %lld.

There are *no* unsigned integers in Active Directory LDAP, even the RID
allocations and ms-DS-Secondary-KrbTgt-Number are *signed* quantities.
(See the schema, and the syntax definitions in schema_syntax.c).

The failure has been detected by Matthieu Patou on the buildfarm host "tridge"
due to a malformed "groupType" attribute.

The solution is to use the "%d" specifier. Either to use it directly - or better
(when possible) use the call "samdb_msg_add_uint" (which encapsulates it).

This patch changes such problematic situations.