os-collect-config on overcloud nodes filling /var/log on undercloud

Issue

• os-collect-config polling from the overcloud nodes causes nova-api.log on the undercloud to fill up with messages like:

[root@undercloud.. nova]# tailf nova-api.log
2017-05-22 13:39:03.328 4444 INFO nova.metadata.wsgi.server [req-e31a71e8-9d68-41e5-bd74-a0ae717c52a4 - - - - -] 172.16.9.23 "GET /latest/meta-data/placement/ HTTP/1.1" status: 200 len: 158 time: 0.0009689
2017-05-22 13:39:03.332 4444 INFO nova.metadata.wsgi.server [req-e31a71e8-9d68-41e5-bd74-a0ae717c52a4 - - - - -] 172.16.9.23 "GET /latest/meta-data/placement/availability-zone HTTP/1.1" status: 200 len: 144 time: 0.0009561
2017-05-22 13:39:03.336 4444 INFO nova.metadata.wsgi.server [req-e31a71e8-9d68-41e5-bd74-a0ae717c52a4 - - - - -] 172.16.9.23 "GET /latest/meta-data/public-hostname HTTP/1.1" status: 200 len: 186 time: 0.0009701
2017-05-22 13:39:03.340 4444 INFO nova.metadata.wsgi.server [req-e31a71e8-9d68-41e5-bd74-a0ae717c52a4 - - - - -] 172.16.9.23 "GET /latest/meta-data/public-ipv4 HTTP/1.1" status: 200 len: 140 time: 0.0009630
2017-05-22 13:39:03.344 4444 INFO nova.metadata.wsgi.server [req-e31a71e8-9d68-41e5-bd74-a0ae717c52a4 - - - - -] 172.16.9.23 "GET /latest/meta-data/public-keys/ HTTP/1.1" status: 200 len: 149 time: 0.0009799
2017-05-22 13:39:03.348 4444 INFO nova.metadata.wsgi.server [req-e31a71e8-9d68-41e5-bd74-a0ae717c52a4 - - - - -] 172.16.9.23 "GET /latest/meta-data/public-keys/0/ HTTP/1.1" status: 200 len: 152 time: 0.0009911
2017-05-22 13:39:03.353 4444 INFO nova.metadata.wsgi.server [req-e31a71e8-9d68-41e5-bd74-a0ae717c52a4 - - - - -] 172.16.9.23 "GET /latest/meta-data/public-keys/0/openssh-key HTTP/1.1" status: 200 len: 585 time: 0.0009830
2017-05-22 13:39:03.357 4444 INFO nova.metadata.wsgi.server [req-e31a71e8-9d68-41e5-bd74-a0ae717c52a4 - - - - -] 172.16.9.23 "GET /latest/meta-data/ramdisk-id HTTP/1.1" status: 200 len: 153 time: 0.0009761
2017-05-22 13:39:03.361 4444 INFO nova.metadata.wsgi.server [req-e31a71e8-9d68-41e5-bd74-a0ae717c52a4 - - - - -] 172.16.9.23 "GET /latest/meta-data/reservation-id HTTP/1.1" status: 200 len: 151 time: 0.0009639
2017-05-22 13:39:03.365 4444 INFO nova.metadata.wsgi.server [req-e31a71e8-9d68-41e5-bd74-a0ae717c52a4 - - - - -] 172.16.9.23 "GET /latest/meta-data/security-groups HTTP/1.1" status: 200 len: 147 time: 0.0010059