confdb was initialized twice in monitor. The 1st time in
load_configuration and the 2nd time in server_setup.

libldb-1.4.0 contains stricter checking of PID which created db.
ldb_tdb: Prevent ldb_tdb reuse after a fork()

We may relax this restriction in the future, but for now do not assume
that the caller has done a tdb_reopen_all() at the right time.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>

It did not cause any problem when sssd was stared in interactive mode
(used by systemd) But it cause failures in daemon mode which is used
in cwrap integration

[sssd] [ldb] (0x4000): Destroying timer event 0x5555557b1d30 "ltdb_timeout"
[sssd] [ldb] (0x4000): Ending timer event 0x5555557cbdd0 "ltdb_callback"
[sssd] [server_setup] (0x0400): CONFDB: /var/lib/sss/db/config.ldb
[sssd] [ldb] (0x0010): Failed to unlock db: ../ldb_tdb/ldb_tdb.c:147: Reusing ldb opend by pid 28889 in process 28893
/ Protocol error
[sssd] [confdb_get_param] (0x0020): Failed to get [krb5_rcache_dir] from [config/sssd], error [5] (Input/output error)
[sssd] [confdb_get_string] (0x0020): Failed to get [krb5_rcache_dir] from [config/sssd], error [5] (Input/output error)