For verification,

Check whether the following setting are included in the ganesha.conf file used by the ganesha server,

# To disable caching
CACHEINODE {
	Dir_Max = 1;
	Dir_Chunk = 0;
	Cache_FDs = false;
	NParts = 1;
	Cache_Size = 1;
}


EXPORT_DEFAULTS {
	Attr_Expiration_Time = 0;
}


Also, check ganesha's log file for any warnings about the above config setting not being recognized by the ganesha server. There shouldn't be any. This is because the ganesha server doesn't error out if it can't recognize a setting, instead it logs a warning in the log file saying so.
e.g.,

[main] config_errs_to_log :CONFIG :WARN :Config File (/etc/ganesha/ganesha.conf:10): Unknown parameter (Attr_Expiration_Time)

This bug is marked for inclusion in the errata but does not currently contain draft documentation text. To ensure the timely release of this advisory please provide draft documentation text for this bug as soon as possible.

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Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:2574

With puddle 2018-08-22.2 and 8.0.4-20.el7ost the verification criteria from https://bugzilla.redhat.com/show_bug.cgi?id=1567511#c15 are met:

[root@controller-0 ~]# docker exec ceph-nfs-pacemaker grep -B 1 -A 12 'Attr_Expiration' /etc/ganesha/ganesha.conf
EXPORT_DEFAULTS {
	Attr_Expiration_Time = 0;
}

CACHEINODE {
	Dir_Max = 1;
	Dir_Chunk = 0;

	Cache_FDs = false;

	NParts = 1;
	Cache_Size = 1;
}

[root@controller-0 ~]# docker exec ceph-nfs-pacemaker grep WARN /var/log/ganesha/ganesha.log
05/09/2018 16:54:44 : epoch 5b900a54 : controller-0 : ganesha.nfsd-137[main] main :NFS STARTUP :WARN :No export entries found in configuration file !!!
05/09/2018 16:54:44 : epoch 5b900a54 : controller-0 : ganesha.nfsd-137[main] nfs_rpc_cb_init_ccache :NFS STARTUP :WARN :gssd_refresh_krb5_machine_credential failed (-1765328160:0)
[root@controller-0 ~]#