Comment 6 for bug 1603842

Verified on MOS7.0 + mu6 updates.

Before:
[root@nailgun ~]# /usr/bin/dockerctl backup /var/log/fueldocker
Pausing containers...
Error response from daemon: Cannot pause container 1aa4d276d822: Container 1aa4d276d822ea1d2094b36555cf7c10b6295a3057398931e345cdbc53c80c8d is already paused
FATA[0000] Error: failed to pause container named 1aa4d276d822
Error response from daemon: Cannot pause container 49e39a65aad3: Container 49e39a65aad3590d180574dd500a645079be70a8065378f44741ec9fae542389 is already paused
FATA[0000] Error: failed to pause container named 49e39a65aad3
Error response from daemon: Cannot pause container 7aeecf62b111: Container 7aeecf62b1116caa6da39cb515bc6841776c9e35b1ff155e5de86fb24d7425a4 is already paused
FATA[0000] Error: failed to pause container named 7aeecf62b111
Error response from daemon: Cannot pause container 31b55fb30dbd: Container 31b55fb30dbddc62e49fc30b4310416482b8080a55c207a68660ceebbe81e6d3 is already paused
FATA[0000] Error: failed to pause container named 31b55fb30dbd
Error response from daemon: Cannot pause container 924ad0f790ee: Container 924ad0f790eeee65ac006ec1948808dcc8818e076332f6409239c370e1390e2f is already paused
FATA[0000] Error: failed to pause container named 924ad0f790ee
82cc8d4ef38d
2a3f8d574537
525741b5f4cc
fb42a86da6a3
a26c37b9717f
778fcd21972a
Backup failed!
After:
[root@nailgun ~]# /usr/bin/dockerctl backup /var/log/fueldocker
.....
NOTE: Following containers was not unpaused because they were paused before backup
90b06316d41e 41323e3b84f3 97ba40c27061
Backing up PostgreSQL database to /var/log/fueldocker/postgres_backup.sql...
Compressing archives...
/var/log/fueldocker/fuel_backup_2016-10-16_1504.tar - Compression Ratio: 35.843. Average Compression Speed: 77.000MB/s.
Total time: 00:00:01.59
Cleaning up...
Backup complete. File is available at /var/log/fueldocker/fuel_backup_2016-10-16_1504.tar.lrz