I had the same problem with CentOS 7 container and OpenVZ node with CentOS6 kernel 2.6.32-042stab108.6
The update to the latest stable OpenVZ kernel (currently 2.6.32-042stab117.14) resolved the issue.
[root@devovz01 ~]# vzctl enter 106
entered into CT 106
[root@host /]# yum update -y
Loaded plugins: fastestmirror
base | 3.6 kB 00:00:00
extras | 3.4 kB 00:00:00
updates | 3.4 kB 00:00:00
(1/4): extras/7/x86_64/primary_db | 165 kB 00:00:00
(2/4): base/7/x86_64/group_gz | 155 kB 00:00:00
(3/4): updates/7/x86_64/primary_db | 7.8 MB 00:00:05
(4/4): base/7/x86_64/primary_db | 5.3 MB 00:00:06
Determining fastest mirrors
* base: mirrors.coreix.net
* extras: centos.serverspace.co.uk
* updates: centos.serverspace.co.uk
Resolving Dependencies
--> Running transaction check
---> Package bash.x86_64 0:4.2.46-19.el7 will be updated
---> Package bash.x86_64 0:4.2.46-20.el7_2 will be an update
---> Package dbus.x86_64 1:1.6.12-13.el7 will be updated
---> Package dbus.x86_64 1:1.6.12-14.el7_2 will be an update
---> Package dbus-libs.x86_64 1:1.6.12-13.el7 will be updated
.............................................................
Updated:
bash.x86_64 0:4.2.46-20.el7_2 dbus.x86_64 1:1.6.12-14.el7_2 dbus-libs.x86_64 1:1.6.12-14.el7_2 glibc.x86_64 0:2.17-106.el7_2.8
glibc-common.x86_64 0:2.17-106.el7_2.8 initscripts.x86_64 0:9.49.30-1.el7_2.3 kmod.x86_64 0:20-8.el7_2 kmod-libs.x86_64 0:20-8.el7_2
kpartx.x86_64 0:0.4.9-85.el7_2.6 libarchive.x86_64 0:3.1.2-10.el7_2 libblkid.x86_64 0:2.23.2-26.el7_2.3 libmount.x86_64 0:2.23.2-26.el7_2.3
libsmbclient.x86_64 0:4.2.10-7.el7_2 libuuid.x86_64 0:2.23.2-26.el7_2.3 libwbclient.x86_64 0:4.2.10-7.el7_2 mariadb-libs.x86_64 1:5.5.50-1.el7_2
nscd.x86_64 0:2.17-106.el7_2.8 python.x86_64 0:2.7.5-39.el7_2 python-libs.x86_64 0:2.7.5-39.el7_2 samba.x86_64 0:4.2.10-7.el7_2
samba-client.x86_64 0:4.2.10-7.el7_2 samba-client-libs.x86_64 0:4.2.10-7.el7_2 samba-common.noarch 0:4.2.10-7.el7_2 samba-common-libs.x86_64 0:4.2.10-7.el7_2
samba-common-tools.x86_64 0:4.2.10-7.el7_2 samba-libs.x86_64 0:4.2.10-7.el7_2 systemd.x86_64 0:219-19.el7_2.13 systemd-libs.x86_64 0:219-19.el7_2.13
systemd-sysv.x86_64 0:219-19.el7_2.13 util-linux.x86_64 0:2.23.2-26.el7_2.3
Complete!
systemctl status works without D-bus errors.